checkpatch: perform indent checks on perl

So that we eat our own dog food ensure the indent checks apply to perl
too.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/checkpatch.pl

@@ -1266,8 +1266,8 @@ sub process {
 			WARN("adding a line without newline at end of file\n" . $herecurr);
 		}
 
-# check we are in a valid source file *.[hc] if not then ignore this hunk
-		next if ($realfile !~ /\.[hc]$/);
+# check we are in a valid source file C or perl if not then ignore this hunk
+		next if ($realfile !~ /\.(h|c|pl)$/);
 
 # at the beginning of a line any tabs must come first and anything
 # more than 8 must use tabs.
@@ -1277,6 +1277,9 @@ sub process {
 			ERROR("code indent should use tabs where possible\n" . $herevet);
 		}
 
+# check we are in a valid C source file if not then ignore this hunk
+		next if ($realfile !~ /\.(h|c)$/);
+
 # check for RCS/CVS revision markers
 		if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
 			WARN("CVS style keyword markers, these will _not_ be updated\n". $herecurr);