scsi: fnic: Remove usage of host_lock

scsi: fnic: Remove usage of host_lock

Remove usage of host_lock.  Replace with fnic_lock, where necessary.  fnic
does not use host_lock. fnic uses fnic_lock.  Use fnic lock to protect fnic
members in fnic_queuecommand.  Add log messages in error cases.

Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
Link: https://lore.kernel.org/r/20231211173617.932990-10-kartilak@cisco.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>