ARM: dts: Add dts files for sam9x60ek

add device tree files for sam9x60ek board with below changes.

- Add initial device nodes (pmc, pinctrl, sdhc, dbgu & pit)
- Add the reg property for the pinctrl node.
- Add the "u-boot,dm-pre-reloc" property to determine which nodes
  are used by the board_init_f stage.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>
[prasanthi.chellakumar@microchip.com: fix style/whitespace issues]
Signed-off-by: Prasanthi Chellakumar <prasanthi.chellakumar@microchip.com>
[nicolas.ferre@microchip.com:
- fix gclk,
- fix pio/pinctrl controller definition and allow to have more
  than only PIOA for this SoC,
- removing pinctrl address]
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[claudiu.beznea@microchip.com:
- use SAM9X60's compatible for pinctrl
- add drive strength and slew rate options for SDMMC0 pins.]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
[tudor.ambarus@microchip.com:
- u-boot,dm-pre-reloc property in dedicated file,
- fix pit len, starts from 0xFFFFFE40 and it is of len 0x10]
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
new file mode 100644
index 0000000..e64566e
--- /dev/null
+++ b/arch/arm/dts/sam9x60ek.dts
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * sam9x60ek.dts - Device Tree file for SAM9X60 EK board
+ *
+ * Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Sandeep Sheriker M <Sandeepsheriker.mallikarjun@microchip.com>
+ */
+/dts-v1/;
+#include "sam9x60.dtsi"
+
+/ {
+	model = "Microchip SAM9X60-Ek";
+	compatible = "microchip,sam9x60ek", "microchip,sam9x60", "atmel,at91sam9";
+
+	chosen {
+		stdout-path = &dbgu;
+	};
+};