usb: gadget: gr_udc: Fix check for invalid number of microframes

The value 0x3 (not 0x11) in the field for additional transaction/microframe
is reserved and should not be let through. Be clear in the error message about
what value caused the error return.
Reported-by: NDavid Binderman <dcb314@hotmail.com>
Signed-off-by: NAndreas Larsson <andreas@gaisler.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/gadget/gr_udc.c

@@ -1532,8 +1532,9 @@ static int gr_ep_enable(struct usb_ep *_ep,
 			"%s mode: multiple trans./microframe not valid\n",
 			(mode == 2 ? "Bulk" : "Control"));
 		return -EINVAL;
-	} else if (nt == 0x11) {
-		dev_err(dev->dev, "Invalid value for trans./microframe\n");
+	} else if (nt == 0x3) {
+		dev_err(dev->dev,
+			"Invalid value 0x3 for additional trans./microframe\n");
 		return -EINVAL;
 	} else if ((nt + 1) * max > buffer_size) {
 		dev_err(dev->dev, "Hw buffer size %d < max payload %d * %d\n",