mpt3sas_scsih: don't set QUEUE_FLAG_NOMERGES

Setting QUEUE_FLAG_NOMERGES was added in commit d1b01d14 ("scsi:
mpt3sas: Set NVMe device queue depth as 128") without any explanation.
Drivers should second guess the block layer merge decisions, so remove
the flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240627124926.512662-4-hch@lst.de


Signed-off-by: Jens Axboe <axboe@kernel.dk>