ARM: sunxi: Add A31 reset driver to sunxi_defconfig

Now that the A31 reset code is a driver of its own, we need it in the
defconfig.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
ARM: multi_v7: Add Allwinner reset drivers to multi_v7_defconfig

Now that the reset code are part of drivers of their own, we need those in the
defconfig.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>