Fixup! usb: dwc2: limit "maximum packet size" for split-IN transfers

Control Setup phase transfers needs an 8 byte maxpacket override, or
drivers doing a GET with a small buffer as a split transaction would
cause broken transfers.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

Author: P33M

drivers/usb/dwc2/hcd.c

@@ -2338,6 +2338,7 @@ static void dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
 			else
 				chan->xfer_buf = urb->setup_packet;
 			chan->xfer_len = 8;
+			chan->max_packet = 8;
 			break;
 
 		case DWC2_CONTROL_DATA: