USB: imx_udc: Fix IMX UDC gadget bugs

Fix small bugs and add some omptimization in IMX UDC Gadget.

Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/imx_udc.h b/drivers/usb/gadget/imx_udc.h
index 8500769..d1dfb2d 100644
--- a/drivers/usb/gadget/imx_udc.h
+++ b/drivers/usb/gadget/imx_udc.h
@@ -170,7 +170,7 @@
 /* #define DEBUG_IRQ */
 /* #define DEBUG_EPIRQ */
 /* #define DEBUG_DUMP */
-#define DEBUG_ERR
+/* #define DEBUG_ERR */
 
 #ifdef DEBUG_REQ
 	#define D_REQ(dev, args...)	dev_dbg(dev, ## args)