[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/lops.c b/fs/gfs2/lops.c
index 07655a7..f8f6d4b 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -518,7 +518,7 @@
 	unsigned int num, n;
 	__be64 *ptr = NULL;
 
-	offset += (2*sizeof(__be64) - 1);
+	offset += 2*sizeof(__be64) - 1;
 	offset &= ~(2*sizeof(__be64) - 1);
 	limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);