net: dsa: mv88e6xxx: unconditionally set ATU trunk

Set the trunk member of the mv88e6xxx_atu_entry structure regardless its
value, so that uninitialized structures gets the correct boolean value.

Note that no mainline code is affected by the current behavior.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/global1_atu.c

@@ -121,9 +121,7 @@ static int mv88e6xxx_g1_atu_data_read(struct mv88e6xxx_chip *chip,
 
 	entry->state = val & 0xf;
 	if (entry->state != GLOBAL_ATU_DATA_STATE_UNUSED) {
-		if (val & GLOBAL_ATU_DATA_TRUNK)
-			entry->trunk = true;
-
+		entry->trunk = !!(val & GLOBAL_ATU_DATA_TRUNK);
 		entry->portvec = (val >> 4) & mv88e6xxx_port_mask(chip);
 	}