checkpatch: Fix bracing false positives on #else

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 55ef439..4fa06c0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2536,7 +2536,8 @@
 			}
 		}
 		if (!defined $suppress_ifbraces{$linenr - 1} &&
-					$line =~ /\b(if|while|for|else)\b/) {
+					$line =~ /\b(if|while|for|else)\b/ &&
+					$line !~ /\#\s*else/) {
 			my $allowed = 0;
 
 			# Check the pre-context.