sunxi: h616: defconfigs: enable eMMC

Now that eMMC is working properly on H616 devices, it became apparent
that some boards were missing the right defconfig bits to enable eMMC
access.

Add the eMMC device number to the Tanix TX1 and the X96 Mate defconfig,
also the eMMC boot option to the TX1. Oddly enough the X96 Mate had
just this bit already.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
2 files changed