mtd/SMI: Add support for ST SMI controller

In the current u-boot, a driver exists for ST's SMI controller. However, the driver is SPEAr specific. This patchset makes the driver more generic so that it can be used across multiple platforms.

In the first commit, the driver is renamed to st_smi. In subsequent patches, changes are introduced so as to make the driver generic.

Amit Virdi (4):
st_smi: Remove compilation warning
st_smi: Return error in case TFF is not set
st_smi: Change SMI timeout values
st_smi: Enhance the error handling

Armando Visconti (3):
st_smi: Removed no needed dependency on ST_M25Pxx_ID
st_smi: Change the flash probing method
st_smi: Fix bug in flash_print_info()

Shiraz Hashim (1):
st_smi: Move status register read before modifying ctrl register

Vipin KUMAR (2):
st_smi: Add support for SPEAr SMI driver
st_smi: Read status until timeout happens

Vipin Kumar (1):
st_smi: Fix smi read status

  drivers/mtd/Makefile                               |    2 +-
  drivers/mtd/{spr_smi.c =>  st_smi.c}                |  223 ++++++++++++--------
  include/configs/spear-common.h                     |    6 +-
  .../spr_smi.h =>  include/linux/mtd/st_smi.h        |   10 +-
  4 files changed, 140 insertions(+), 101 deletions(-)

rename drivers/mtd/{spr_smi.c => st_smi.c} (66%)
rename arch/arm/include/asm/arch-spear/spr_smi.h => include/linux/mtd/st_smi.h (95%)