ARM: dts: pxa: add pxa-timer to pxa27x and pxa3xx

Each pxa has an embedded OS Timers IP. The kernel cannot work without a
valid clocksource, and this adds the OS Timers to the pxa device-tree
description.
Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr>

arch/arm/boot/dts/pxa27x.dtsi

@@ -85,4 +85,12 @@
 			status = "okay";
 		};
 	};
+
+	timer@40a00000 {
+		compatible = "marvell,pxa-timer";
+		reg = <0x40a00000 0x20>;
+		interrupts = <26>;
+		clocks = <&clks CLK_OSTIMER>;
+		status = "okay";
+	};
 };

arch/arm/boot/dts/pxa3xx.dtsi

@@ -59,4 +59,12 @@
 			status = "okay";
 		};
 	};
+
+	timer@40a00000 {
+		compatible = "marvell,pxa-timer";
+		reg = <0x40a00000 0x20>;
+		interrupts = <26>;
+		clocks = <&clks CLK_OSTIMER>;
+		status = "okay";
+	};
 };