checkpatch: replace __bitwise__ with __bitwise

__bitwise__ is an implementation detail now.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index fd3556b..982c52c 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -335,7 +335,7 @@
 			__percpu|
 			__nocast|
 			__safe|
-			__bitwise__|
+			__bitwise|
 			__packed__|
 			__packed2__|
 			__naked|
@@ -3681,7 +3681,7 @@
 		    $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
 		    $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
 		    $line !~ /\b$typeTypedefs\b/ &&
-		    $line !~ /\b__bitwise(?:__|)\b/) {
+		    $line !~ /\b__bitwise\b/) {
 			WARN("NEW_TYPEDEFS",
 			     "do not add new typedefs\n" . $herecurr);
 		}