phy: phy-twl4030-usb: emit VBUS status events to userspace

Emit KOBJ_ONLINE/KOBJ_OFFLINE action uevent on VBUS status changes.

Cc: Tony Lindgren <[e-mail]>
Signed-off-by: Matt Ranostay <[e-mail]>
Acked-by: Tony Lindgren <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

drivers/phy/phy-twl4030-usb.c

···
 			linkstat = MUSB_VBUS_OFF;
 	}
 
+	kobject_uevent(&twl->dev->kobj, linkstat == MUSB_VBUS_VALID
+					? KOBJ_ONLINE : KOBJ_OFFLINE);
+
 	dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
 			status, status, linkstat);