sfc: use flow_rule_is_supp_enc_control_flags()

Change the existing check for unsupported encapsulation control flags,
to use the new helper flow_rule_is_supp_enc_control_flags().

No functional change, only compile tested.
Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Reviewed-by: Davide Caratti <dcaratti@redhat.com>
Link: https://lore.kernel.org/r/20240609173358.193178-3-ast@fiberby.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/sfc/tc.c

@@ -387,11 +387,8 @@ static int efx_tc_flower_parse_match(struct efx_nic *efx,
 		struct flow_match_control fm;
 
 		flow_rule_match_enc_control(rule, &fm);
-		if (fm.mask->flags) {
-			NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported match on enc_control.flags %#x",
-					       fm.mask->flags);
+		if (flow_rule_has_enc_control_flags(fm.mask->flags, extack))
 			return -EOPNOTSUPP;
-		}
 		if (!IS_ALL_ONES(fm.mask->addr_type)) {
 			NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported enc addr_type mask %u (key %u)",
 					       fm.mask->addr_type,