suniv: switch Allwinner F1Cx00 boards to OF_UPSTREAM

In contrast to some other Allwinner SoCs, there is no difference between
the DTs for the Allwinner F1C100/F1C200 SoCs (sunvi) between the U-Boot
and the Linux kernel repository.

Remove the old copies of the F1Cx00 related .dts and .dtsi files, and
switch the whole suniv SoC over to use OF_UPSTREAM.

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