CVE-2021-47160

In the Linux kernel, the following vulnerability has been resolved: net:
dsa: mt7530: fix VLAN traffic leaks PCR_MATRIX field was set to all 1’s
when VLAN filtering is enabled, but was not reset when it is disabled,
which may cause traffic leaks: ip link add br0 type bridge vlan_filtering 1
ip link add br1 type bridge vlan_filtering 1 ip link set swp0 master br0 ip
link set swp1 master br1 ip link set br0 type bridge vlan_filtering 0 ip
link set br1 type bridge vlan_filtering 0 # traffic in br0 and br1 will
start leaking to each other As port_bridge_{add,del} have set up PCR_MATRIX
properly, remove the PCR_MATRIX write from mt7530_port_set_vlan_aware.