megaraid_sas: don't set QUEUE_FLAG_NOMERGES

Setting QUEUE_FLAG_NOMERGES was added in commit 15dd0381
("scsi: megaraid_sas: NVME Interface detection and prop settings")
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/20240627124926.512662-3-hch@lst.de


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