scsi: libfc: Fix array index out of bound exception

stable inclusion
from linux-4.19.199
commit 4921b1618045ffab71b1050bf0014df3313a2289

--------------------------------

[ Upstream commit b27c4577 ]

Fix array index out of bound exception in fc_rport_prli_resp().

Link: https://lore.kernel.org/r/20210615165939.24327-1-jhasan@marvell.com


Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>