ARM: config: keystone: enable AEMIF/NAND support

Keystone SoC uses the same NAND driver as Davinci, so enable
Davinci NAND and AEIMF that provides interface for it.
Signed-off-by: NIvan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>

arch/arm/configs/keystone_defconfig

@@ -111,6 +111,7 @@ CONFIG_MTD_BLOCK=y
 CONFIG_MTD_PLATRAM=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_DAVINCI=y
 CONFIG_MTD_UBI=y
 CONFIG_PROC_DEVICETREE=y
 CONFIG_BLK_DEV_LOOP=y
@@ -147,6 +148,7 @@ CONFIG_DMADEVICES=y
 CONFIG_TI_EDMA=y
 CONFIG_COMMON_CLK_DEBUG=y
 CONFIG_MEMORY=y
+CONFIG_TI_AEMIF=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_MSDOS_FS=y