USB: xhci: Avoid global namespace pollution.

Make all globally visible functions start with xhci_ and mark functions as
static if they're only called within the same C file.  Fix some long lines
while we're at it.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/xhci-mem.c

@@ -746,7 +746,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 	xhci_writel(xhci, 0, &xhci->ir_set->erst_base[1]);
 
 	/* Set the event ring dequeue address */
-	set_hc_event_deq(xhci);
+	xhci_set_hc_event_deq(xhci);
 	xhci_dbg(xhci, "Wrote ERST address to ir_set 0.\n");
 	xhci_print_ir_set(xhci, xhci->ir_set, 0);