net: bnx2x: fix error value sign

bnx2x_init_one() should return negative value on error.
By mistake it returns ENODEV instead of -ENODEV.

Signed-off-by: Vasiliy Kulikov <[e-mail]>
Acked-by: Eilon Greenstein <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/bnx2x/bnx2x_main.c

···
 	default:
 		pr_err("Unknown board_type (%ld), aborting\n",
 			   ent->driver_data);
-		return ENODEV;
+		return -ENODEV;
 	}
 
 	cid_count += CNIC_CONTEXT_USE;