checkpatch: warn only on "space before semicolon" at end of line

The "space before a non-naked semicolon" test has unwanted output when
used in "for ( ;; )" loops.

Make the test work only on end-of-line statement termination semicolons.
Signed-off-by: NJoe Perches <joe@perches.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

scripts/checkpatch.pl

@@ -3121,7 +3121,7 @@ sub process {
 		}
 
 # check for whitespace before a non-naked semicolon
-		if ($line =~ /^\+.*\S\s+;/) {
+		if ($line =~ /^\+.*\S\s+;\s*$/) {
 			if (WARN("SPACING",
 				 "space prohibited before semicolon\n" . $herecurr) &&
 			    $fix) {