feat(plat/xilinx/zynqmp): add support for runtime feature config

Add support for runtime feature configuration which are running on the
 firmware. Add new IOCTL IDs like IOCTL_SET_FEATURE_CONFIG and
 IOCTL_GET_FEATURE_CONFIG for configuring the features.

Signed-off-by: Ronak Jain <ronak.jain@xilinx.com>
Change-Id: I976aef15932783a25396b2adeb4c8f140cc87e79
4 files changed