target: add missing sense_reason_t annotations

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --cc drivers/target/target_core_file.c
Simple merge

diff --cc drivers/target/target_core_iblock.c
Simple merge

diff --cc drivers/target/target_core_spc.c
Simple merge