UBUNTU: SAUCE: timeconst.pl -- fix use of defined on arrays

The recent perl transition has turned the use of defined(@array) into an
error.  The defined is simply not required.  Remove it to quiet the
error.

BugLink: http://bugs.launchpad.net/bugs/1549677
Signed-off-by: Andy Whitcroft <apw@canonical.com>

kernel/timeconst.pl

@@ -370,7 +370,7 @@ if ($hz eq '--can') {
 	}
 
 	@val = @{$canned_values{$hz}};
-	if (!defined(@val)) {
+	if (!@val) {
 		@val = compute_values($hz);
 	}
 	output($hz, @val);