block: make core bits checkpatch compliant

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --cc block/blk-barrier.c
Simple merge

diff --cc block/blk-core.c
Simple merge

diff --cc block/blk-exec.c
Simple merge

diff --cc block/blk-map.c
Simple merge

diff --cc block/blk-merge.c
Simple merge

diff --cc block/blk-settings.c
Simple merge

diff --cc block/blk-sysfs.c
Simple merge

diff --cc block/blk-tag.c
Simple merge