lirc scancode interface, and more

Introduce lirc scancode mode, use that to port lirc_zilog to rc-core using that interface, and then remove the lirc kernel api.

In summary:
- This removes the lirc staging directory.
- lirc IR TX can use in-kernel encoders for scancode encoding
- lirc_zilog uses the same interface
- lirc kapi (not uapi!) is gone
- The reading lirc scancode gives more information (e.g. protocol, toggle, repeat). So you can determine what protocol variant a remotes uses
- Line count is actually down and code cleaner (imo)

v2:
- Add MAINTAINERS entries
- Fixes for nec repeat
- Validate scancode for tx
- Minor bugfixes

v3:
- Review comments from Hans Verkuil
- Documented and fixed rc_validate_scancode()
- Fix a bug in kfifo on arm 32-bit
- this inferface won't be used for cec remote control passthrough

Sean Young (26):
media: lirc: implement scancode sending
media: lirc: use the correct carrier for scancode transmit
media: rc: auto load encoder if necessary
media: lirc_zilog: remove receiver
media: lirc_zilog: fix variable types and other ugliness
media: lirc_zilog: port to rc-core using scancode tx interface
media: promote lirc_zilog out of staging
media: lirc: remove LIRCCODE and LIRC_GET_LENGTH
media: lirc: lirc interface should not be a raw decoder
media: lirc: validate scancode for transmit
media: rc: document and fix rc_validate_scancode()
media: lirc: merge lirc_dev_fop_ioctl and ir_lirc_ioctl
media: lirc: use kfifo rather than lirc_buffer for raw IR
media: lirc: move lirc_dev->attached to rc_dev->registered
media: lirc: do not call rc_close() on unregistered devices
media: lirc: create rc-core open and close lirc functions
media: lirc: remove name from lirc_dev
media: lirc: remove last remnants of lirc kapi
media: lirc: implement reading scancode
media: rc: ensure lirc device receives nec repeats
media: lirc: document LIRC_MODE_SCANCODE
media: lirc: introduce LIRC_SET_POLL_MODES
media: lirc: scancode rc devices should have a lirc device too
media: MAINTAINERS: remove lirc staging area
media: MAINTAINERS: add entry for zilog_ir
kfifo: DECLARE_KIFO_PTR(fifo, u64) does not work on arm 32 bit

 Documentation/media/kapi/rc-core.rst               |    5 -
 Documentation/media/lirc.h.rst.exceptions          |   31 +
 Documentation/media/uapi/rc/lirc-dev-intro.rst     |   68 +-
 Documentation/media/uapi/rc/lirc-func.rst          |    2 +-
 Documentation/media/uapi/rc/lirc-get-features.rst  |   17 +-
 Documentation/media/uapi/rc/lirc-get-length.rst    |   44 -
 Documentation/media/uapi/rc/lirc-get-rec-mode.rst  |    5 +-
 Documentation/media/uapi/rc/lirc-get-send-mode.rst |    2 +-
 Documentation/media/uapi/rc/lirc-read.rst          |   15 +-
 .../media/uapi/rc/lirc-set-poll-modes.rst          |   52 +
 Documentation/media/uapi/rc/lirc-write.rst         |   19 +-
 MAINTAINERS                                        |   12 +-
 drivers/media/rc/Kconfig                           |   41 +-
 drivers/media/rc/Makefile                          |    6 +-
 drivers/media/rc/ir-jvc-decoder.c                  |    1 +
 drivers/media/rc/ir-lirc-codec.c                   |  566 ++++---
 drivers/media/rc/ir-mce_kbd-decoder.c              |   12 +-
 drivers/media/rc/ir-nec-decoder.c                  |    1 +
 drivers/media/rc/ir-rc5-decoder.c                  |    1 +
 drivers/media/rc/ir-rc6-decoder.c                  |    1 +
 drivers/media/rc/ir-sanyo-decoder.c                |    1 +
 drivers/media/rc/ir-sharp-decoder.c                |    1 +
 drivers/media/rc/ir-sony-decoder.c                 |    1 +
 drivers/media/rc/lirc_dev.c                        |  489 +-----
 drivers/media/rc/rc-core-priv.h                    |   54 +-
 drivers/media/rc/rc-ir-raw.c                       |   56 +-
 drivers/media/rc/rc-main.c                         |  166 +-
 drivers/media/rc/zilog_ir.c                        |  742 +++++++++
 drivers/staging/media/Kconfig                      |    3 -
 drivers/staging/media/Makefile                     |    1 -
 drivers/staging/media/lirc/Kconfig                 |   21 -
 drivers/staging/media/lirc/Makefile                |    6 -
 drivers/staging/media/lirc/TODO                    |   36 -
 drivers/staging/media/lirc/lirc_zilog.c            | 1653 --------------------
 include/linux/kfifo.h                              |    3 +-
 include/media/lirc_dev.h                           |  192 ---
 include/media/rc-core.h                            |   55 +-
 include/media/rc-map.h                             |   54 +-
 include/uapi/linux/lirc.h                          |   91 ++
 39 files changed, 1734 insertions(+), 2792 deletions(-)
 delete mode 100644 Documentation/media/uapi/rc/lirc-get-length.rst
 create mode 100644 Documentation/media/uapi/rc/lirc-set-poll-modes.rst
 create mode 100644 drivers/media/rc/zilog_ir.c
 delete mode 100644 drivers/staging/media/lirc/Kconfig
 delete mode 100644 drivers/staging/media/lirc/Makefile
 delete mode 100644 drivers/staging/media/lirc/TODO
 delete mode 100644 drivers/staging/media/lirc/lirc_zilog.c
 delete mode 100644 include/media/lirc_dev.h

2.13.6