[GFS2] Remove function gfs2_get_block

This patch is just a cleanup.  Function gfs2_get_block() just calls
function gfs2_block_map reversing the last two parameters.  By
reversing the parameters, gfs2_block_map() may be called directly
and function gfs2_get_block may be eliminated altogether.
Since this function is done for every block operation,
this streamlines the code and makes it a little bit more efficient.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 2569c13..597f7ff 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -323,7 +323,7 @@
 	do {
 		bh.b_state = 0;
 		bh.b_size = size;
-		gfs2_block_map(inode, lblock, 1, &bh);
+		gfs2_block_map(inode, lblock, &bh, 1);
 		if (!buffer_mapped(&bh))
 			return -EIO;
 		size -= bh.b_size;