Revert "driver: block: release the lo_work_lock before queue_work"

This reverts commit ad934fc1784802fd1408224474b25ee5289fadfc.

loop_queue_work should be strictly serialized to loop_process_work since
the lo_worker could be freed without noticing new work has been queued
again.

Signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Link: https://lore.kernel.org/r/20250218065835.19503-1-zhaoyang.huang@unisoc.com


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