USB: EHCI: remove useless test

This patch (as1605) removes a useless test from the EHCI debugfs
code.  There's no point checking whether p.qh is non-NULL; we already
know it is and in any case it gets dereferenced aerlier in the
function.

The useless test was identified by smatch.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-dbg.c

@@ -653,10 +653,8 @@ static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
 						seen [seen_count++].qh = p.qh;
 				} else
 					temp = 0;
-				if (p.qh) {
-					tag = Q_NEXT_TYPE(ehci, hw->hw_next);
-					p = p.qh->qh_next;
-				}
+				tag = Q_NEXT_TYPE(ehci, hw->hw_next);
+				p = p.qh->qh_next;
 				break;
 			case Q_TYPE_FSTN:
 				temp = scnprintf (next, size,