ARM: imx_v4_v5_defconfig: Re-sync defconfig

Re-sync the defconfig by doing:

make savedefconfig
cp defconfig arch/arm/configs/imx_v4_v5_defconfig

So keep it in sync to help further changes in defconfig.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>