checkpatch: remove column limit for checkpatch patches

Currently checkpatch is enforcing an 80 character column
limit. This should not be applied for patches modifying
checkpatch.

Change-Id: I8e8935e633d79a7ee535ce6a90e54447a22d9a91
Signed-off-by: Israel Schlesinger <israels@codeaurora.org>
(cherry picked from commit 4aa1b864119e2d0e49efefcd6dba7349f13c3939)
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index aea2a2b..b10a16d 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2753,8 +2753,7 @@
 #
 # if LONG_LINE is ignored, the other 2 types are also ignored
 #
-
-		if ($line =~ /^\+/ && $length > $max_line_length) {
+		if ($line =~ /^\+/ && $length > $max_line_length && $realfile ne "scripts/checkpatch.pl") {
 			my $msg_type = "LONG_LINE";
 
 			# Check the allowed long line types first