net: dsa: mt7530: fix VLAN traffic leaks again

stable inclusion
from stable-v5.10.62
commit b6c657abb893ef456fad6b229089f37127202df0
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9BHG2
CVE: CVE-2021-47160

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b6c657abb893ef456fad6b229089f37127202df0



--------------------------------

commit 7428022b upstream.

When a port leaves a VLAN-aware bridge, the current code does not clear
other ports' matrix field bit. If the bridge is later set to VLAN-unaware
mode, traffic in the bridge may leak to that port.

Remove the VLAN filtering check in mt7530_port_bridge_leave.

Fixes: 474a2dda ("net: dsa: mt7530: fix VLAN traffic leaks")
Fixes: 83163f7d ("net: dsa: mediatek: add VLAN support for MT7530")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Conflicts:
	drivers/net/dsa/mt7530.c
Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com>