scsi: bfa: Demote seemingly unintentional kerneldoc header

This is the only use of kerneldoc in the source file and no
descriptions are provided.

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

drivers/scsi/bfa/bfa_core.c:1245: warning: Function parameter or member 'bfa' not described in 'bfa_iocfc_qreg'
drivers/scsi/bfa/bfa_core.c:1245: warning: Function parameter or member 'qreg' not described in 'bfa_iocfc_qreg'

Link: https://lore.kernel.org/r/[e-mail]
Cc: Anil Gurumurthy <[e-mail]>
Cc: Sudarsana Kalluru <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/bfa/bfa_core.c

···
 		complete(&bfad->disable_comp);
 }
 
-/**
+/*
  * configure queue registers from firmware response
  */
 static void