tg3: Add support for selfboot format 1 v6

5718 B0 and 5719 devices will use a new selfboot firmware format.  This
patch adds code to detect the new format so that bootcode versions get
reported correctly.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 943c283..978ba5d 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -12702,6 +12702,9 @@
 	case TG3_EEPROM_SB_REVISION_5:
 		offset = TG3_EEPROM_SB_F1R5_EDH_OFF;
 		break;
+	case TG3_EEPROM_SB_REVISION_6:
+		offset = TG3_EEPROM_SB_F1R6_EDH_OFF;
+		break;
 	default:
 		return;
 	}