zynqmp: pm: Add wrappers for Pin control APIs

Add wrappers for pin control APIs. Actual implementation of
these APIs would be done in subsequent changes.

Signed-off-by: Rajan Vaja <rajanv@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.h b/plat/xilinx/zynqmp/pm_service/pm_api_sys.h
index af7b252..f240d49 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.h
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -93,5 +93,17 @@
 
 enum pm_ret_status pm_get_chipid(uint32_t *value);
 void pm_get_callbackdata(uint32_t *data, size_t count);
+enum pm_ret_status pm_pinctrl_request(unsigned int pin);
+enum pm_ret_status pm_pinctrl_release(unsigned int pin);
+enum pm_ret_status pm_pinctrl_get_function(unsigned int pin,
+					   unsigned int *value);
+enum pm_ret_status pm_pinctrl_set_function(unsigned int pin,
+					   unsigned int value);
+enum pm_ret_status pm_pinctrl_get_config(unsigned int pin,
+					 unsigned int param,
+					 unsigned int *value);
+enum pm_ret_status pm_pinctrl_set_config(unsigned int pin,
+					 unsigned int param,
+					 unsigned int value);
 
 #endif /* _PM_API_SYS_H_ */