kernel-doc: move ignoring kmemcheck

Somehow I managed to generate a diff that put these 2 lines
into the wrong function:  should have been in dump_struct()
instead of in dump_enum().
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/kernel-doc

@@ -1426,6 +1426,8 @@ sub dump_struct($$) {
 	# strip comments:
 	$members =~ s/\/\*.*?\*\///gos;
 	$nested =~ s/\/\*.*?\*\///gos;
+	# strip kmemcheck_bitfield_{begin,end}.*;
+	$members =~ s/kmemcheck_bitfield_.*?;//gos;
 
 	create_parameterlist($members, ';', $file);
 	check_sections($file, $declaration_name, "struct", $sectcheck, $struct_actual, $nested);
@@ -1468,8 +1470,6 @@ sub dump_enum($$) {
 	    }
 
 	}
-	# strip kmemcheck_bitfield_{begin,end}.*;
-	$members =~ s/kmemcheck_bitfield_.*?;//gos;
 
 	output_declaration($declaration_name,
 			   'enum',