sfc: Support extraction of CAPABILITIES from GET_BOARD_CFG response.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/ethernet/sfc/mtd.c b/drivers/net/ethernet/sfc/mtd.c
index b702862..eff49da 100644
--- a/drivers/net/ethernet/sfc/mtd.c
+++ b/drivers/net/ethernet/sfc/mtd.c
@@ -631,7 +631,7 @@
 	uint16_t fw_subtype_list[MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MINNUM];
 	int rc;
 
-	rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list);
+	rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list, NULL);
 	if (rc)
 		return rc;