zynqmp: pm: Update return type in query functions

In pm_query_data() function return type is stored in response so
there is no use of return type. Update return type of function
pm_query_data() from enum pm_ret_status to void. Similarly
update return type of pm_api_clock_get_name() and
pm_api_pinctrl_get_function_name() functions.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Change-Id: Id811926f0b4ebcc472480bb94f3b88109eb036cd
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_pinctrl.c b/plat/xilinx/zynqmp/pm_service/pm_api_pinctrl.c
index 4b8dfb6..05bbe72 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_pinctrl.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_pinctrl.c
@@ -2604,18 +2604,13 @@
  *
  * This function is used by master to get name of function specified
  * by given function ID.
- *
- * @return	Returns success. In case of error, name data is 0.
  */
-enum pm_ret_status pm_api_pinctrl_get_function_name(unsigned int fid,
-						    char *name)
+void pm_api_pinctrl_get_function_name(unsigned int fid, char *name)
 {
 	if (fid >= MAX_FUNCTION)
 		memcpy(name, END_OF_FUNCTION, FUNCTION_NAME_LEN);
 	else
 		memcpy(name, pinctrl_functions[fid].name, FUNCTION_NAME_LEN);
-
-	return PM_RET_SUCCESS;
 }
 
 /**