scsi: libfc: use error code for fc_rport_error()

We only ever use the 'fp' argument for fc_rport_error() to
encapsulate the error code, so we can as well do away with that
and pass the error directly.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

include/scsi/libfc.h

@@ -44,6 +44,11 @@
 #define	FC_NO_ERR	0	/* no error */
 #define	FC_EX_TIMEOUT	1	/* Exchange timeout */
 #define	FC_EX_CLOSED	2	/* Exchange closed */
+#define FC_EX_ALLOC_ERR	3	/* Exchange allocation failed */
+#define FC_EX_XMIT_ERR	4	/* Exchange transmit failed */
+#define FC_EX_ELS_RJT	5	/* ELS rejected */
+#define FC_EX_INV_LOGIN	6	/* Login not completed */
+#define FC_EX_SEQ_ERR	6	/* Exchange sequence error */
 
 /**
  * enum fc_lport_state - Local port states