xilinx: versal: Add PM_INIT_FINALIZE API for versal

PM_INIT_FINALIZE is not required for versal. To use Linux
Zynqmp PM driver for versal, handle PM_INIT_FINALIZE API
in ATF for versal by always returning SUCCESS.

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I6fe5445d78e713d70282ac8931ff8b17c96b2a14
diff --git a/plat/xilinx/versal/pm_service/pm_defs.h b/plat/xilinx/versal/pm_service/pm_defs.h
index fa35066..e8a3f3d 100644
--- a/plat/xilinx/versal/pm_service/pm_defs.h
+++ b/plat/xilinx/versal/pm_service/pm_defs.h
@@ -35,6 +35,7 @@
 #define PM_SET_REQUIREMENT		15U
 #define PM_RESET_ASSERT			17U
 #define PM_RESET_GET_STATUS		18U
+#define PM_INIT_FINALIZE		21U
 #define	PM_PINCTRL_REQUEST		28U
 #define	PM_PINCTRL_RELEASE		29U
 #define	PM_PINCTRL_GET_FUNCTION		30U