pca100: use correct irq initialisation function

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx2/pca100.c b/arch/arm/mach-mx2/pca100.c
index fe5b165..aea3d34 100644
--- a/arch/arm/mach-mx2/pca100.c
+++ b/arch/arm/mach-mx2/pca100.c
@@ -237,7 +237,7 @@
 	.io_pg_offst    = ((AIPI_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 	.boot_params    = PHYS_OFFSET + 0x100,
 	.map_io         = mx27_map_io,
-	.init_irq       = mxc_init_irq,
+	.init_irq       = mx27_init_irq,
 	.init_machine   = pca100_init,
 	.timer          = &pca100_timer,
 MACHINE_END