bnx2fc: Do not log error for netevents that need no action

Do not log error for netevents that need no action such as
NETDEV_REGISTER 0x0005, NETDEV_CHANGEADDR, and NETDEV_CHANGENAME.
It results in logging error messages such as these

[ 35.315872] bnx2fc: Unknown netevent 5
[ 35.315935] bnx2fc: Unknown netevent 8
[ 35.353866] bnx2fc: Unknown netevent 10

and generating bug reports.
Remove logging this message as an ERROR instead of turning them into
either DEBUG or INFO level messages.

Signed-off-by: Shirish Pargaonkar <[e-mail]>
Acked-by: Eddie Wai <[e-mail]>
Acked-by: Chad Dupuis <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/bnx2fc/bnx2fc_fcoe.c

···
 		return;
 
 	default:
-		printk(KERN_ERR PFX "Unknown netevent %ld", event);
 		return;
 	}