gfs2: Don't support fallocate on jdata	files
gfs2: Don't support fallocate on jdata	files

We cannot provide an efficient implementation due to the headers
on the data blocks, so there doesn't seem much point in having it.

Signed-off-by: Abhi Das <0d65ec5fc381668782b153e0078f3ea20344faa3@redhat.com>
Signed-off-by: Bob Peterson <0c71a8c45d1c28c49aceef3749b4faa9d3c35c54@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs