blk-mq: Rename blk_mq_request_direct_issue() into blk_mq_request_issue_directly()

blk-mq: Rename blk_mq_request_direct_issue() into blk_mq_request_issue_directly()

BugLink: https://bugs.launchpad.net/bugs/1848739
Most blk-mq functions have a name that follows the pattern blk_mq_${action}.
However, the function name blk_mq_request_direct_issue is an exception.
Hence rename this function. This patch does not change any functionality.

Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit c77ff7fd03ddca8face268c4cf093c0edf4bcf1f)
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>