plat: xilinx: versal: Add load Pdi API support

This patch adds support for load pdi api to enable loading
pdi from linux.

Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I48549e276e1f7b9be45a0bebf559f73bd09d5f69
diff --git a/plat/xilinx/versal/pm_service/pm_defs.h b/plat/xilinx/versal/pm_service/pm_defs.h
index a7b0a02..892804d 100644
--- a/plat/xilinx/versal/pm_service/pm_defs.h
+++ b/plat/xilinx/versal/pm_service/pm_defs.h
@@ -78,6 +78,9 @@
 #define PM_PLL_GET_MODE			51U
 #define PM_FEATURE_CHECK		63U
 
+/* Loader API ids */
+#define PM_LOAD_PDI			0x701U
+
 /* IOCTL IDs for clock driver */
 #define IOCTL_SET_PLL_FRAC_MODE		8
 #define	IOCTL_GET_PLL_FRAC_MODE		9