usb: gadget: m66592-udc: don't touch gadget.dev.driver

udc-core now handles that for us, which means
we can remove it from our driver.

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index ae33e53..21a20a6f 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1471,7 +1471,6 @@
 	/* hook up the driver */
 	driver->driver.bus = NULL;
 	m66592->driver = driver;
-	m66592->gadget.dev.driver = &driver->driver;
 
 	m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
 	if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
@@ -1494,7 +1493,6 @@
 	m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
 
 	driver->unbind(&m66592->gadget);
-	m66592->gadget.dev.driver = NULL;
 
 	init_controller(m66592);
 	disable_controller(m66592);