msm: devices: Initialize MPM irq extensions for MSM9615

Initialize the mpm irq callbacks, so that the mpm
can be programmed for wakeup interrupts.

Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Change-Id: I43611f35cc6fb9ec9539f4a86c84984dc55593e3
diff --git a/arch/arm/mach-msm/devices-9615.c b/arch/arm/mach-msm/devices-9615.c
index 9521d0e..6c826dd 100644
--- a/arch/arm/mach-msm/devices-9615.c
+++ b/arch/arm/mach-msm/devices-9615.c
@@ -578,6 +578,8 @@
 void __init msm9615_init_irq(void)
 {
 	unsigned int i;
+
+	msm_mpm_irq_extn_init();
 	gic_init(0, GIC_PPI_START, MSM_QGIC_DIST_BASE,
 						(void *)MSM_QGIC_CPU_BASE);