arm: lpc32xx: add rtc-device

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Kevin Wells <Kevin.wells@nxp.com>
diff --git a/arch/arm/mach-lpc32xx/common.h b/arch/arm/mach-lpc32xx/common.h
index e81243c..5583f52 100644
--- a/arch/arm/mach-lpc32xx/common.h
+++ b/arch/arm/mach-lpc32xx/common.h
@@ -29,6 +29,7 @@
 extern struct platform_device lpc32xx_i2c1_device;
 extern struct platform_device lpc32xx_i2c2_device;
 extern struct platform_device lpc32xx_tsc_device;
+extern struct platform_device lpc32xx_rtc_device;
 
 /*
  * Other arch specific structures and functions