mt7530 mt7530_fdb_write only set ivl bit vid larger than 1

Fixes my earlier patch which broke vlan unaware bridges.

The IVL bit now only gets set for vid's larger than 1.

Fixes: 11d8d98c ("mt7530 fix mt7530_fdb_write vid missing ivl bit")
Signed-off-by: Eric Woudstra <ericwouds@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mt7530.c

@@ -366,6 +366,7 @@ mt7530_fdb_write(struct mt7530_priv *priv, u16 vid,
 	int i;
 
 	reg[1] |= vid & CVID_MASK;
+	if (vid > 1)
 		reg[1] |= ATA2_IVL;
 	reg[2] |= (aging & AGE_TIMER_MASK) << AGE_TIMER;
 	reg[2] |= (port_mask & PORT_MAP_MASK) << PORT_MAP;