[GFS2] Style changes in logging code

As per Jan Engelhardt's comments, removed some unused code and
removed some brackets which were not required.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c
index ab55191..a27569c 100644
--- a/fs/gfs2/recovery.c
+++ b/fs/gfs2/recovery.c
@@ -306,8 +306,8 @@
 	u32 length;
 	__be64 *ptr;
 	unsigned int offset = sizeof(struct gfs2_log_descriptor);
-	offset += (sizeof(__be64)-1);
-	offset &= ~(sizeof(__be64)-1);
+	offset += sizeof(__be64) - 1;
+	offset &= ~(sizeof(__be64) - 1);
 
 	while (start != end) {
 		error = gfs2_replay_read_block(jd, start, &bh);