uboot-imx

ARM: AM437x: Sync defconfig between GP and HS EVM

Adds missing NAND option to CONFIG_SYS_EXTRA_OPTIONS for
AM437x HS EVMs. This syncs up the config options between
GP and HS EVMs.

Signed-off-by: Madan Srinivas <madans@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>