MFC r293899

sfxge: cleanup: adjust efx_mcdi_get_port_modes() comment for clarity

Fix an explanatory comment which did not explain very well.

Submitted by:   Richard Houldsworth <rhouldsworth at solarflare.com>
Reviewed by:    gnn
Sponsored by:   Solarflare Communications, Inc.

sys/dev/sfxge/common/hunt_nic.c

@@ -112,7 +112,10 @@ efx_mcdi_get_port_modes(
 		goto fail1;
 	}
 
-	/* Accept pre-Medford size (8 bytes - no CurrentMode field) */
+	/*
+	 * Require only Modes and DefaultMode fields.
+	 * (CurrentMode field was added for Medford)
+	 */
 	if (req.emr_out_length_used <
 	    MC_CMD_GET_PORT_MODES_OUT_CURRENT_MODE_OFST) {
 		rc = EMSGSIZE;