Nand flash 要改 layout

include/configs/am335x_evm.h 修改 define
這樣可以影響arch/arm/include/asm/arch-am335x/omap_gpmc.h (之前是 arch-omap3/)

DRAM 要改 timing

arch/arm/include/asm/arch-am33xx/ddr_defs.h
arch/arm/cpu/armv7/am33xx/board.c 中會 invoke config_ddr --> config_sdram