Big work on sunxi DW DRAM controllers and some new DDR type support

This patchset contains several works on the sunxi DesignWare DRAM controllers.

The 1st patch made an option for H3-like DRAM controllers (DesignWare ones), which can ease further import of alike controllers.

The 2nd and 3rd patches are for supporting 16-bit DW DRAM controllers, in order to add V3s DRAM support (The controller on V3s is 16-bit).

The 4th patch adds bank detection code, in order to support some DDR2 chips.

The 5th patch adds a framework for select DRAM type and timing -- it's needed for boards that use DRAM chips rather than DDR3.

The 6th patch enables dual rank detection in the DW DRAM code on SoCs except R40. For R40 the dual rank facility is still not so clear, so it's temporarily disabled.

The 7th~9th patches enables support for DRAM initialization and SPL for the V3s SoC, which integrates a DDR2 chip.

The 10th and 11th patches adds support for LPDDR3, with the stock boot0 timing. (Seen in A83T boot0 source and some leaked H5/R40 libdram source)

The 12th patches adds a defconfig for SoPine w/ official baseboard, which utilizes LPDDR3.

Icenowy Zheng (12):
sunxi: makes an invisible option for H3-like DRAM controllers
sunxi: Rename bus-width related macros in H3 DRAM code
sunxi: add option for 16-bit DW DRAM controller
sunxi: add bank detection code to H3 DRAM initialization code
sunxi: Add selective DRAM type and timing
sunxi: enable dual rank detection in DesignWare-like DRAM code
sunxi: add support for the DDR2 in V3s SoC
sunxi: add support for V3s DRAM controller
sunxi: enable DRAM initialization and SPL for V3s SoC
sunxi: add LPDDR3 DRAM type support for DesignWare-like DRAM
controller
sunxi: add LPDDR3 timing from stock boot0
sunxi: add a defconfig for SoPine w/ official baseboard

 arch/arm/include/asm/arch-sunxi/dram.h             |   6 +-
 .../{dram_sun8i_h3.h => dram_sunxi_dw.h}           |  36 +++-
 arch/arm/mach-sunxi/Kconfig                        |  75 ++++++++-
 arch/arm/mach-sunxi/Makefile                       |   5 +-
 .../{dram_sun8i_h3.c => dram_sunxi_dw.c}           | 187 +++++++--------------
 arch/arm/mach-sunxi/dram_timings/Makefile          |   3 +
 arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c        |  84 +++++++++
 arch/arm/mach-sunxi/dram_timings/ddr3_1333.c       |  87 ++++++++++
 arch/arm/mach-sunxi/dram_timings/lpddr3_stock.c    |  83 +++++++++
 configs/sopine_baseboard_defconfig                 |  22 +++

 10 files changed, 453 insertions(+), 135 deletions(-)
 rename arch/arm/include/asm/arch-sunxi/{dram_sun8i_h3.h => dram_sunxi_dw.h} (86%)
 rename arch/arm/mach-sunxi/{dram_sun8i_h3.c => dram_sunxi_dw.c} (84%)
 create mode 100644 arch/arm/mach-sunxi/dram_timings/Makefile
 create mode 100644 arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c
 create mode 100644 arch/arm/mach-sunxi/dram_timings/ddr3_1333.c
 create mode 100644 arch/arm/mach-sunxi/dram_timings/lpddr3_stock.c
 create mode 100644 configs/sopine_baseboard_defconfig