fix(versal): resolve misra 15.6 warnings

MISRA Violation: MISRA-C:2012 R.15.6
- The body of an iteration-statement or a selection-statement shall be
a compound statement.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: Ia1d6fcabd36d18ff2dab6c22579ffafd5211fc1f
diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.c b/plat/xilinx/versal/pm_service/pm_api_sys.c
index 60b66e8..db78049 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.c
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.c
@@ -93,8 +93,9 @@
 	module_id = (x0 & MODULE_ID_MASK) >> 8;
 
 	//default module id is for LIBPM
-	if (module_id == 0)
+	if (module_id == 0) {
 		module_id = LIBPM_MODULE_ID;
+	}
 
 	PM_PACK_PAYLOAD6(payload, module_id, flag, x0, x1, x2, x3, x4, x5);
 	return pm_ipi_send_sync(primary_proc, payload, (uint32_t *)result, PAYLOAD_ARG_CNT);