ARM: dts: at91: sam9x60: add device tree for soc and board

Add device tree files for SAM9X60 SoC and SAM9X60-EK board.
Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/1579085987-13976-6-git-send-email-claudiu.beznea@microchip.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

arch/arm/boot/dts/Makefile

@@ -47,6 +47,8 @@ dtb-$(CONFIG_SOC_AT91SAM9) += \
 	at91sam9g35ek.dtb \
 	at91sam9x25ek.dtb \
 	at91sam9x35ek.dtb
+dtb-$(CONFIG_SOC_SAM9X60) += \
+	at91-sam9x60ek.dtb
 dtb-$(CONFIG_SOC_SAM_V7) += \
 	at91-kizbox2-2.dtb \
 	at91-kizbox3-hs.dtb \