scsi: mvsas: Use sas_find_attached_phy_id() instead of open coding it

The attached phy finding is open coded. Replace it with
sas_find_attached_phy_id(). To keep things consistent, the return value of
mvs_dev_found_notify() is also changed to -ENODEV after calling
sas_find_attathed_phy_id() failed.

Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20220928070130.3657183-5-yanaijie@huawei.com
Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>