ARM: dts: sirf: add lost minigpsrtc device node

This patch adds lost minigpsrtc device node for prima2 and atlas6,
which is behind rtc-iobg and whose offset is 2000.

Signed-off-by: Xianglong Du <Xianglong.Du@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>

arch/arm/boot/dts/atlas6.dtsi

@@ -711,6 +711,12 @@
 				interrupts = <52 53 54>;
 			};
 
+			minigpsrtc@2000 {
+				compatible = "sirf,prima2-minigpsrtc";
+				reg = <0x2000 0x1000>;
+				interrupts = <54>;
+			};
+
 			pwrc@3000 {
 				compatible = "sirf,prima2-pwrc";
 				reg = <0x3000 0x1000>;

arch/arm/boot/dts/prima2.dtsi

@@ -739,6 +739,12 @@
 				interrupts = <52 53 54>;
 			};
 
+			minigpsrtc@2000 {
+				compatible = "sirf,prima2-minigpsrtc";
+				reg = <0x2000 0x1000>;
+				interrupts = <54>;
+			};
+
 			pwrc@3000 {
 				compatible = "sirf,prima2-pwrc";
 				reg = <0x3000 0x1000>;