Merge pull request #1732 from jollysxilinx/integration

plat: xilinx: Clock and PLL EEMI API Support

diff --cc plat/xilinx/zynqmp/pm_service/pm_api_clock.c
Simple merge

diff --cc plat/xilinx/zynqmp/pm_service/pm_api_clock.h
Simple merge

diff --cc plat/xilinx/zynqmp/pm_service/pm_api_ioctl.c
Simple merge

diff --cc plat/xilinx/zynqmp/pm_service/pm_api_sys.c
Simple merge

diff --cc plat/xilinx/zynqmp/pm_service/pm_api_sys.h
Simple merge

diff --cc plat/xilinx/zynqmp/pm_service/pm_svc_main.c
Simple merge