uboot-imx

ARM: dts: keystone-k2g-evm: Add unit address to memory node

Upstream Linux has the unit address being added to the various 66AK2Gx
boards dts. Therefore, update the dts to mimic this change.

Also remove memory node from the base K2G dtsi file.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>