ceph: cleanup the logic in ceph_invalidatepage
ceph: cleanup the logic in ceph_invalidatepage

The invalidatepage code bails if it encounters a non-zero page offset. The
current logic that does is non-obvious with multiple if statements.

This should be logically and functionally equivalent.

Signed-off-by: Milosz Tanski <ee5ae273a7b7b58e18e64b2b8af0da2a3015a58e@adfin.com>
Reviewed-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@inktank.com>

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