firmware: xilinx: add new function for do_feature_check_call

Add new function for sending feature check request to firmware and
call it from zynqmp_pm_feature().

Signed-off-by: Ronak Jain <ronak.jain@xilinx.com>
Link: https://lore.kernel.org/r/1649242526-17493-3-git-send-email-ronak.jain@xilinx.com


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