usb: dwc3: xilinx: add power management ops support

Added system sleep and run-time power management ops support for
dwc3-xilinx glue layer and update function name.

Signed-off-by: Piyush Mehta <piyush.mehta@amd.com>
Link: https://lore.kernel.org/r/20220912111017.901321-2-piyush.mehta@amd.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>