usb: otg: TWL4030: Update the last_event variable.

Update the last_event variable of otg_transceiver. This will be used in
the musb platform glue driver for runtime idling the device.

Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index 2362d83..e01b073 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -275,6 +275,8 @@
 	dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
 			status, status, linkstat);
 
+	twl->otg.last_event = linkstat;
+
 	/* REVISIT this assumes host and peripheral controllers
 	 * are registered, and that both are active...
 	 */