scsi: bfa: Remove unused variable 'adisc'

scsi: bfa: Remove unused variable 'adisc'

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/bfa/bfa_fcs_rport.c: In function ‘bfa_fcs_rport_process_adisc’:
 drivers/scsi/bfa/bfa_fcs_rport.c:2243:21: warning: variable ‘adisc’ set but not used [-Wunused-but-set-variable]

Link: https://lore.kernel.org/r/20200723122446.1329773-28-lee.jones@linaro.org
Cc: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
Cc: Sudarsana Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>