refactor(xilinx): move pm_defs.h to common place

Moved pm_defs.h file to common place so that it can be used for
Versal NET and ZynqMP. Also moved common code from zynqmp_pm_defs.h to
common place.

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Change-Id: I2ee1e72258c6052cdd6467cdbcf4009afb98da49
10 files changed