[SCSI] libfc, libfcoe: FDISC ELS for NPIV

Add FDISC ELS handling to libfc and libfcoe, treat it the same as FLOGI where
appropriate.

Add checking for NPIV support in the FLOGI LS_ACC service parameters.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/include/scsi/fc/fc_els.h b/include/scsi/fc/fc_els.h
index 195ca01..b0872af 100644
--- a/include/scsi/fc/fc_els.h
+++ b/include/scsi/fc/fc_els.h
@@ -248,10 +248,12 @@
 /*
  * sp_features
  */
-#define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel. off. */
+#define	FC_SP_FT_NPIV	0x8000	/* multiple N_Port_ID support (FLOGI) */
+#define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel off (PLOGI) */
 #define	FC_SP_FT_CLAD	0x8000	/* clean address (in FLOGI LS_ACC) */
 #define	FC_SP_FT_RAND	0x4000	/* random relative offset */
 #define	FC_SP_FT_VAL	0x2000	/* valid vendor version level */
+#define	FC_SP_FT_NPIV_ACC	0x2000	/* NPIV assignment (FLOGI LS_ACC) */
 #define	FC_SP_FT_FPORT	0x1000	/* F port (1) vs. N port (0) */
 #define	FC_SP_FT_ABB	0x0800	/* alternate BB_credit management */
 #define	FC_SP_FT_EDTR	0x0400	/* E_D_TOV Resolution is nanoseconds */