nand/denali: Adding Denali NAND driver support

nand/denali: Adding Denali NAND driver support

To add the Denali NAND driver support into U-Boot.
This driver is leveraged from Linux with commit ID
fdbad98dff8007f2b8bee6698b5d25ebba0471c9. For Denali
controller 64 variance, you need to declare macro
CONFIG_SYS_NAND_DENALI_64BIT.

Signed-off-by: Chin Liang See <[email protected]>
Cc: Scott Wood <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Masahiro Yamada <[email protected]>
Tested-by: Masahiro Yamada <[email protected]>