selftests: net: mscc: ocelot: bring up the ports automatically

Looks like when I wrote the selftests I was using a network manager that
brought up the ports automatically. In order to not rely on that, let
the script open them up.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -156,6 +156,11 @@ create_tcam_skeleton()
 
 setup_prepare()
 {
+	ip link set $eth0 up
+	ip link set $eth1 up
+	ip link set $eth2 up
+	ip link set $eth3 up
+
 	create_tcam_skeleton $eth0
 
 	ip link add br0 type bridge