USB: gadget: dummy_hcd.c: fix nested switch statements

Fix a messed up combination of two nested switch statements in
drivers/usb/gadget/dummy_hcd.c.

According to the USB spec (section 5.8.3) the maximum packet size for bulk
endpoints can be 512 for high-speed devices and 8, 16, 32 or 64 for full-speed
devices.  Low-speed devices must not have bulk endpoints.
Signed-off-by: NIngo van Lil <inguin@gmx.de>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/dummy_hcd.c

@@ -365,16 +365,14 @@ dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 		case USB_SPEED_HIGH:
 			if (max == 512)
 				break;
-			/* conserve return statements */
-		default:
-			switch (max) {
-			case 8: case 16: case 32: case 64:
+			goto done;
+		case USB_SPEED_FULL:
+			if (max == 8 || max == 16 || max == 32 || max == 64)
 				/* we'll fake any legal size */
 				break;
-			default:
-		case USB_SPEED_LOW:
-				goto done;
-			}
+			/* save a return statement */
+		default:
+			goto done;
 		}
 		break;
 	case USB_ENDPOINT_XFER_INT: