usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half

Enable HCD_BH flag for musb host controller driver.
This improves the MSC/UVC through put. With this enabled
even 640x480@30fps webcam streaming is also supported.

Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_host.c

@@ -2613,7 +2613,7 @@ static const struct hc_driver musb_hc_driver = {
 	.description		= "musb-hcd",
 	.product_desc		= "MUSB HDRC host driver",
 	.hcd_priv_size		= sizeof(struct musb *),
-	.flags			= HCD_USB2 | HCD_MEMORY,
+	.flags			= HCD_USB2 | HCD_MEMORY | HCD_BH,
 
 	/* not using irq handler or reset hooks from usbcore, since
 	 * those must be shared with peripheral code for OTG configs