ARM: dts: suniv: add initial DTSI file for F1C100s

F1C100s is one product with the suniv die, which has a 32MiB co-packaged
DDR1 DRAM chip. As we have the support for suniv pin controller and CCU now, add a
initial DTSI for it.

Signed-off-by: Mesih Kilinc <mesihkilinc@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>