ARM: bcm2835: dt: Add Raspberry Pi Model A

This one is essentially the same as revision 2 B board (with the I2S on
P5 header).

Signed-off-by: Lubomir Rintel <[e-mail]>
Acked-by: Stephen Warren <[e-mail]>
[anholt: Rebased on bcm2835.dtsi -> bcm283x.dtsi change]
Signed-off-by: Eric Anholt <[e-mail]>

arch/arm/boot/dts/Makefile

···
 	axm5516-amarillo.dtb
 dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2835-rpi-b.dtb \
+	bcm2835-rpi-a.dtb \
 	bcm2835-rpi-b-rev2.dtb \
 	bcm2835-rpi-b-plus.dtb \
 	bcm2835-rpi-a-plus.dtb \

arch/arm/boot/dts/bcm2835-rpi-a.dts

···
+/dts-v1/;
+#include "bcm2835.dtsi"
+#include "bcm2835-rpi.dtsi"
+
+/ {
+	compatible = "raspberrypi,model-a", "brcm,bcm2835";
+	model = "Raspberry Pi Model A";
+
+	leds {
+		act {
+			gpios = <&gpio 16 1>;
+		};
+	};
+};
+
+&gpio {
+	pinctrl-0 = <&gpioout &alt0 &i2s_alt2 &alt3>;
+
+	/* I2S interface */
+	i2s_alt2: i2s_alt2 {
+		brcm,pins = <28 29 30 31>;
+		brcm,function = <BCM2835_FSEL_ALT2>;
+	};
+};