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_clock.c b/plat/xilinx/zynqmp/pm_service/pm_api_clock.c
index f2dfbb1..0cc517e 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_clock.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_clock.c
@@ -2446,7 +2446,7 @@
  *
  * @return	Returns success. In case of error, name data is 0.
  */
-enum pm_ret_status pm_api_clock_get_name(unsigned int clock_id, char *name)
+void pm_api_clock_get_name(unsigned int clock_id, char *name)
 {
 	if (clock_id == CLK_MAX)
 		memcpy(name, END_OF_CLK, sizeof(END_OF_CLK) > CLK_NAME_LEN ?
@@ -2458,8 +2458,6 @@
 	else
 		memcpy(name, ext_clocks[clock_id - CLK_MAX_OUTPUT_CLK].name,
 		       CLK_NAME_LEN);
-
-	return PM_RET_SUCCESS;
 }
 
 /**