zynqmp: pm: Implement PLL get parameter EEMI API

This API will be used to get a parameter for the PLL. Parameter values
represent the values as defined in the Zynq MPSoC register reference
manual ug1087.

Signed-off-by: Mirela Simonovic <mirela.simonovic@aggios.com>
Acked-by: Will Wong <WILLW@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
diff --git a/plat/xilinx/zynqmp/pm_service/pm_defs.h b/plat/xilinx/zynqmp/pm_service/pm_defs.h
index fe965c5..167a733 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_defs.h
+++ b/plat/xilinx/zynqmp/pm_service/pm_defs.h
@@ -94,6 +94,7 @@
 	PM_SECURE_AES,
 	/* PLL control API functions */
 	PM_PLL_SET_PARAMETER,
+	PM_PLL_GET_PARAMETER,
 	PM_API_MAX
 };