net: dsa: bcm_sf2: Fill in BCM4908 CFP entries

The BCM4908 switch has 256 CFP entrie, update that setting so CFP can be
used.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/bcm_sf2.c

@@ -1200,7 +1200,7 @@ static const struct bcm_sf2_of_data bcm_sf2_4908_data = {
 	.type		= BCM4908_DEVICE_ID,
 	.core_reg_align	= 0,
 	.reg_offsets	= bcm_sf2_4908_reg_offsets,
-	.num_cfp_rules	= 0, /* FIXME */
+	.num_cfp_rules	= 256,
 	.num_crossbar_int_ports = 2,
 };