arm64: zynqmp: Update device tree for pinmux

Added pin control support in device tree for zynqmp.

Signed-off-by: Chirag Parekh <chirag.parekh@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

include/dt-bindings/pinctrl/pinctrl-zynqmp.h

@@ -0,0 +1,30 @@
+/*
+ * MIO pin configuration defines for Xilinx ZynqMP
+ *
+ * Copyright (C) 2017 Xilinx, Inc.
+ * Author: Chirag Parekh <chirag.parekh@xilinx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _DT_BINDINGS_PINCTRL_ZYNQMP_H
+#define _DT_BINDINGS_PINCTRL_ZYNQMP_H
+
+/* Bit value for IO standards */
+#define IO_STANDARD_LVCMOS33      0
+#define IO_STANDARD_LVCMOS18      1
+
+/* Bit values for Slew Rates */
+#define SLEW_RATE_FAST            0
+#define SLEW_RATE_SLOW            1
+
+/* Bit values for Pin inputs */
+#define PIN_INPUT_TYPE_CMOS       0
+#define PIN_INPUT_TYPE_SCHMITT    1
+
+#endif /* _DT_BINDINGS_PINCTRL_ZYNQMP_H */