sfc: use flow_rule_is_supp_control_flags()

Change the check for unsupported control flags, to use the new helper
flow_rule_is_supp_control_flags().

Since the helper was based on sfc, then nothing really changes.

Compile-tested, and compiled objects are identical.
Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/20240417140712.100905-1-ast@fiberby.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/sfc/tc.c

@@ -273,11 +273,10 @@ static int efx_tc_flower_parse_match(struct efx_nic *efx,
 			match->value.ip_firstfrag = fm.key->flags & FLOW_DIS_FIRST_FRAG;
 			match->mask.ip_firstfrag = true;
 		}
-		if (fm.mask->flags & ~(FLOW_DIS_IS_FRAGMENT | FLOW_DIS_FIRST_FRAG)) {
-			NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported match on control.flags %#x",
-					       fm.mask->flags);
+		if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT |
+						     FLOW_DIS_FIRST_FRAG,
+						     fm.mask->flags, extack))
 			return -EOPNOTSUPP;
-		}
 	}
 	if (dissector->used_keys &
 	    ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |