devicetree: xilinx: zynqmp: add sata node

add sata node with sata fixed clock nodes in dtsi file.
enable sata in zynqmp-ep108.dts with broken-gen2.

Signed-off-by: Suneel Garapati <suneel.garapati@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>