ARM i.MX boards: use CONFIG_MULTI_IRQ_HANDLER

Also, add handle_irq callbacks to machine descriptors.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-imx/mach-pcm043.c b/arch/arm/mach-imx/mach-pcm043.c
index 660ec3e..a27baa4 100644
--- a/arch/arm/mach-imx/mach-pcm043.c
+++ b/arch/arm/mach-imx/mach-pcm043.c
@@ -422,6 +422,7 @@
 	.map_io = mx35_map_io,
 	.init_early = imx35_init_early,
 	.init_irq = mx35_init_irq,
+	.handle_irq = imx35_handle_irq,
 	.timer = &pcm043_timer,
 	.init_machine = pcm043_init,
 MACHINE_END