xhci: Remove debugging about toggling cycle bits.

The code for toggling the cycle bits when the ring wraps around has
worked for years.  The print statement alone is not enough to indicate
there's something wrong with that code.  Now that full transfer tracing
has been ripped out, the print statement or lack thereof won't help
without context of where the enqueue pointer is.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

drivers/usb/host/xhci-ring.c

@@ -155,10 +155,6 @@ static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer
 	while (last_trb(xhci, ring, ring->deq_seg, next)) {
 		if (consumer && last_trb_on_last_seg(xhci, ring, ring->deq_seg, next)) {
 			ring->cycle_state = (ring->cycle_state ? 0 : 1);
-			if (!in_interrupt())
-				xhci_dbg(xhci, "Toggle cycle state for ring %p = %i\n",
-						ring,
-						(unsigned int) ring->cycle_state);
 		}
 		ring->deq_seg = ring->deq_seg->next;
 		ring->dequeue = ring->deq_seg->trbs;
@@ -231,10 +227,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring,
 			/* Toggle the cycle bit after the last ring segment. */
 			if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) {
 				ring->cycle_state = (ring->cycle_state ? 0 : 1);
-				if (!in_interrupt())
-					xhci_dbg(xhci, "Toggle cycle state for ring %p = %i\n",
-							ring,
-							(unsigned int) ring->cycle_state);
 			}
 		}
 		ring->enq_seg = ring->enq_seg->next;
@@ -2476,11 +2468,6 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 			/* Toggle the cycle bit after the last ring segment. */
 			if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) {
 				ring->cycle_state = (ring->cycle_state ? 0 : 1);
-				if (!in_interrupt()) {
-					xhci_dbg(xhci, "queue_trb: Toggle cycle "
-						"state for ring %p = %i\n",
-						ring, (unsigned int)ring->cycle_state);
-				}
 			}
 			ring->enq_seg = ring->enq_seg->next;
 			ring->enqueue = ring->enq_seg->trbs;