USB: whci-hcd: support urbs with scatter-gather lists

Support urbs with scatter-gather lists by trying to fit sg list elements
into page lists in one or more qTDs.  qTDs must end on a wMaxPacketSize
boundary so if this isn't possible the urb's sg list must be copied into
bounce buffers.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/whci/whci-hc.h

@@ -267,8 +267,9 @@ struct whc_qset {
 	unsigned reset:1;
 	struct urb *pause_after_urb;
 	struct completion remove_complete;
-	int max_burst;
-	int max_seq;
+	uint16_t max_packet;
+	uint8_t max_burst;
+	uint8_t max_seq;
 };
 
 static inline void whc_qset_set_link_ptr(u64 *ptr, u64 target)