fiemap: FIEMAP_EXTENT_LAST denotes the last record in the recordset

fiemap: FIEMAP_EXTENT_LAST denotes the last record in the recordset

Remove this check because FIEMAP_EXTENT_LAST denotes the last space
mapping record in the recordset of space mappings attached to the file.
That last mapping might actually map space beyond EOF, in the case of
(a) speculative post-eof preallocations, (b) stripe-aligned allocations
on XFS, or (c) realtime files in XFS.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>