usb: gadget: Add HSIC Power Management

Add HSIC power management to support HSIC core Low Power Mode and
integrate it with System PM and Runtime PM mechanisms.

Change-Id: Id87d5740e7f229e599f8f6bb17a70ac1d8078bf4
Signed-off-by: Ofir Cohen <ofirc@codeaurora.org>
diff --git a/arch/arm/mach-msm/devices-9615.c b/arch/arm/mach-msm/devices-9615.c
index 18acb36..0b204a0 100644
--- a/arch/arm/mach-msm/devices-9615.c
+++ b/arch/arm/mach-msm/devices-9615.c
@@ -921,6 +921,7 @@
 	[16] = MSM_GPIO_TO_INT(15),
 	[19] = MSM_GPIO_TO_INT(26),
 	[20] = MSM_GPIO_TO_INT(28),
+	[22] = USB_HSIC_IRQ,
 	[23] = MSM_GPIO_TO_INT(19),
 	[24] = MSM_GPIO_TO_INT(23),
 	[26] = MSM_GPIO_TO_INT(3),