Avoid overwriting vlan entries with remapped vid in later iterations of
the vlan enumeration loop of mt7530_apply_config().
Fix the problem by refactoring the code to first reset the entire table,
then reprogram only vlans with members to prevent overwriting configured
vlans with unconfigured ones.
Fixes FS#1147, FS#1341
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
bb4002c79d