usb: host: xhci: sparse fixes

drivers/usb/host/xhci.c:1826:14: warning: symbol 'xhci_get_block_size' was not declared. Should it be static?
drivers/usb/host/xhci.c:1844:14: warning: symbol 'xhci_get_largest_overhead' was not declared. Should it be static?
drivers/usb/host/xhci-ring.c:2304:36: warning: context imbalance in 'handle_tx_event' - unexpected unlock
drivers/usb/host/xhci-hub.c:425:6: warning: symbol 'xhci_set_remote_wake_mask' was not declared. Should it be static?

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index b95e3e8..66bc5c3 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1829,7 +1829,7 @@
 				xhci->num_active_eps);
 }
 
-unsigned int xhci_get_block_size(struct usb_device *udev)
+static unsigned int xhci_get_block_size(struct usb_device *udev)
 {
 	switch (udev->speed) {
 	case USB_SPEED_LOW:
@@ -1847,7 +1847,8 @@
 	}
 }
 
-unsigned int xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw)
+static unsigned int
+xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw)
 {
 	if (interval_bw->overhead[LS_OVERHEAD_TYPE])
 		return LS_OVERHEAD;