scsi: libsas: Use sas_phy_addr_match() instead of open coding it

The SAS address comparison of expander phys is open coded. Replace it with
sas_phy_addr_match().

Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20220928070130.3657183-8-yanaijie@huawei.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>