linux-wandboard

block: REQ_NOMERGE is common to the bio and request

So move it into the common setion of the request flags.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit bd1c1c21741cbd6e894960bcbc8b36f719590064)