GFS2: Move gfs2_rmdiri into ops_inode.c

Move gfs2_rmdiri() into ops_inode.c and make it static.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --cc fs/gfs2/inode.c
Simple merge

diff --cc fs/gfs2/inode.h
Simple merge

diff --cc fs/gfs2/ops_inode.c
Simple merge