[ARM] Fix fallout from IRQ regs changes

Some ARM platforms were still broken as a result of the IRQ register
passing changes, mostly due to a missing linux/irq.h include.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/lubbock.c b/arch/arm/mach-pxa/lubbock.c
index ee80d62..142c33c 100644
--- a/arch/arm/mach-pxa/lubbock.c
+++ b/arch/arm/mach-pxa/lubbock.c
@@ -397,7 +397,7 @@
 	if (LUB_IRQ_SET_CLR & (1 << 0))
 		mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 	else {
-		(void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data, NULL);
+		(void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 		enable_irq(LUBBOCK_SD_IRQ);
 	}
 }