GFS2: Rename ops_inode.c to inode.c

This is the final part of the ops_inode.c/inode.c reordering. We
are left with a single file called inode.c which now contains
all the inode operations, as expected.

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

diff --cc fs/gfs2/Makefile
Simple merge

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