usb: increase USB_PORT_RESET_RECOVERY

10ms seems to be too strict for some configurations, so increase to
20ms.

Reviewed by: imp
Pull Request: freebsd#1327

sys/dev/usb/usb.h

@@ -114,7 +114,7 @@ MALLOC_DECLARE(M_USBDEV);
 /* Allow for marginal and non-conforming devices. */
 #define	USB_PORT_RESET_DELAY		50	/* ms */
 #define	USB_PORT_ROOT_RESET_DELAY	200	/* ms */
-#define	USB_PORT_RESET_RECOVERY		10	/* ms */
+#define	USB_PORT_RESET_RECOVERY		20	/* ms */
 #define	USB_PORT_POWERUP_DELAY		300	/* ms */
 #define	USB_PORT_RESUME_DELAY		(20*2)	/* ms */
 #define	USB_SET_ADDRESS_SETTLE		10	/* ms */