[GFS2] Tidy up locking code

As per Jan Engelhardt's second email, this removes some unused code,
and fixes up indenting in various places.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 07a8d02..1a90a19 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -51,17 +51,17 @@
 
 static inline int gfs2_glock_is_held_excl(struct gfs2_glock *gl)
 {
-	return (gl->gl_state == LM_ST_EXCLUSIVE);
+	return gl->gl_state == LM_ST_EXCLUSIVE;
 }
 
 static inline int gfs2_glock_is_held_dfrd(struct gfs2_glock *gl)
 {
-	return (gl->gl_state == LM_ST_DEFERRED);
+	return gl->gl_state == LM_ST_DEFERRED;
 }
 
 static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
 {
-	return (gl->gl_state == LM_ST_SHARED);
+	return gl->gl_state == LM_ST_SHARED;
 }
 
 static inline int gfs2_glock_is_blocking(struct gfs2_glock *gl)