Fix O2/IP32 compile time glitch

Seems somewhere between 2.6.6 and 2.6.7, something happened that makes IP32's build die in drivers/char/rtc.c when trying to reference MACEISA_RTC_IRQ. The attached patch fixes it.

--Kumba

"Such is oft the course of deeds that move the wheels of the world: small hands do them because they must, while the eyes of the great are elsewhere."  --Elrond

@@ -13,6 +13,7 @@
 
 #include <asm/io.h>
 #include <asm/ip32/mace.h>
+#include <asm/ip32/ip32_ints.h>
 
 #define RTC_PORT(x)	(0x70 + (x))
 #define RTC_IRQ		MACEISA_RTC_IRQ