[POWERPC] linkstation updates

1. Fix RTC type - it is a rs5c372a, not rs5c372b
2. Configure both UART interrupts edge-triggered
3. Add a license header to ls_uart.c
4. Check for running on linkstation in a late_initcall() function. Needed
   for multiplatform builds, even though linkstation doesn't support them
   yet
5. Remove unneeded #include from linkstation.c

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/boot/dts/kuroboxHG.dts b/arch/powerpc/boot/dts/kuroboxHG.dts
index ccd15a2..a0007b9 100644
--- a/arch/powerpc/boot/dts/kuroboxHG.dts
+++ b/arch/powerpc/boot/dts/kuroboxHG.dts
@@ -69,7 +69,7 @@
 
 			rtc@32 {
 				device_type = "rtc";
-				compatible = "ricoh,rs5c372b";
+				compatible = "ricoh,rs5c372a";
 				reg = <32>;
 			};
 		};
@@ -80,7 +80,7 @@
 			reg = <80004500 8>;
 			clock-frequency = <7c044a8>;
 			current-speed = <2580>;
-			interrupts = <9 2>;
+			interrupts = <9 0>;
 			interrupt-parent = <&mpic>;
 		};