usb: msm_otg: Migrate to clock apis for XO voting

Use the clock APIs instead of the msm_xo APIs to vote on CXO.
This removes one more msm specific api from this driver and will
allow us to move XO control into the rpm clock driver.

Change-Id: Ie9344aad20651002e98f13cd3adb39680fbd93bd
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index f4cc449..57bc4f3 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -240,7 +240,7 @@
 	unsigned mA_port;
 	struct timer_list id_timer;
 	unsigned long caps;
-	struct msm_xo_voter *xo_handle;
+	struct clk *xo_handle;
 	/*
 	 * Allowing PHY power collpase turns off the HSUSB 3.3v and 1.8v
 	 * analog regulators while going to low power mode.