xilinx: versal: Get rid of xlnx-versal-power.h from bindings

xilinx: versal: Get rid of xlnx-versal-power.h from bindings

Remove xlnx-versal-power.h dt binding header because they should be moved
directly to folder where DTs are. In the Linux kernel this shift already
started by moving xlnx-zynqmp-clk.h to arch/arm64/boot/dts/xilinx/ folder.

U-Boot is using only one PD_DEV_OSPI constact which is moved to
zynqmp_firmware.h header. But handling around it should be fixed anyway
because no driver should be calling xilinx_pm_request() directly.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/a0f0154ef89929517c3217efe025e8021a910b90.1764233963.git.michal.simek@amd.com