net: dsa: b53: remove redundant premature assignment to new_pvid

Variable new_pvid is being assigned with a value that is never read,
the following if statement updates new_pvid with a new value in both
of the if paths. The assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/dsa/b53/b53_common.c

@@ -1325,7 +1325,6 @@ int b53_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering)
 	u16 pvid, new_pvid;
 
 	b53_read16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port), &pvid);
-	new_pvid = pvid;
 	if (!vlan_filtering) {
 		/* Filtering is currently enabled, use the default PVID since
 		 * the bridge does not expect tagging anymore