xilinx: versal: Add request wakeup API

Implement request wakeup API for versal.

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I40a2a4ea85bf05623ac8a17ef4a6fa329babd27e
diff --git a/plat/xilinx/versal/pm_service/pm_defs.h b/plat/xilinx/versal/pm_service/pm_defs.h
index e8a3f3d..cfb1ca6 100644
--- a/plat/xilinx/versal/pm_service/pm_defs.h
+++ b/plat/xilinx/versal/pm_service/pm_defs.h
@@ -29,6 +29,7 @@
 #define PM_SELF_SUSPEND			7U
 #define PM_FORCE_POWERDOWN		8U
 #define PM_ABORT_SUSPEND		9U
+#define PM_REQ_WAKEUP			10U
 #define PM_SYSTEM_SHUTDOWN		12U
 #define PM_REQUEST_DEVICE		13U
 #define PM_RELEASE_DEVICE		14U