selftests: ocelot: tc_flower_chains: make test_vlan_ingress_modify() more comprehensive

We have two IS1 filters of the OCELOT_VCAP_KEY_ANY key type (the one with
"action vlan pop" and the one with "action vlan modify") and one of the
OCELOT_VCAP_KEY_IPV4 key type (the one with "action skbedit priority").
But we have no IS1 filter with the OCELOT_VCAP_KEY_ETYPE key type, and
there was an uncaught breakage there.

To increase test coverage, convert one of the OCELOT_VCAP_KEY_ANY
filters to OCELOT_VCAP_KEY_ETYPE, by making the filter also match on the
MAC SA of the traffic sent by mausezahn, $h1_mac.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230205192409.1796428-2-vladimir.oltean@nxp.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

tools/testing/selftests/drivers/net/ocelot/tc_flower_chains.sh

@@ -246,7 +246,7 @@ test_vlan_ingress_modify()
 	bridge vlan add dev $swp2 vid 300
 
 	tc filter add dev $swp1 ingress chain $(IS1 2) pref 3 \
-		protocol 802.1Q flower skip_sw vlan_id 200 \
+		protocol 802.1Q flower skip_sw vlan_id 200 src_mac $h1_mac \
 		action vlan modify id 300 \
 		action goto chain $(IS2 0 0)