net: dsa: realtek: rtl8365mb: remove learn_limit_max private data member

The variable is just assigned the value of a macro, so it can be
removed.
Signed-off-by: NAlvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/dsa/realtek/rtl8365mb.c

@@ -563,7 +563,6 @@ struct rtl8365mb_port {
  * @irq: registered IRQ or zero
  * @chip_id: chip identifier
  * @chip_ver: chip silicon revision
- * @learn_limit_max: maximum number of L2 addresses the chip can learn
  * @cpu: CPU tagging and CPU port configuration for this chip
  * @mib_lock: prevent concurrent reads of MIB counters
  * @ports: per-port data
@@ -577,7 +576,6 @@ struct rtl8365mb {
 	int irq;
 	u32 chip_id;
 	u32 chip_ver;
-	u32 learn_limit_max;
 	struct rtl8365mb_cpu cpu;
 	struct mutex mib_lock;
 	struct rtl8365mb_port ports[RTL8365MB_MAX_NUM_PORTS];
@@ -1088,15 +1086,13 @@ static void rtl8365mb_port_stp_state_set(struct dsa_switch *ds, int port,
 static int rtl8365mb_port_set_learning(struct realtek_priv *priv, int port,
 				       bool enable)
 {
-	struct rtl8365mb *mb = priv->chip_data;
-
 	/* Enable/disable learning by limiting the number of L2 addresses the
 	 * port can learn. Realtek documentation states that a limit of zero
 	 * disables learning. When enabling learning, set it to the chip's
 	 * maximum.
 	 */
 	return regmap_write(priv->map, RTL8365MB_LUT_PORT_LEARN_LIMIT_REG(port),
-			    enable ? mb->learn_limit_max : 0);
+			    enable ? RTL8365MB_LEARN_LIMIT_MAX : 0);
 }
 
 static int rtl8365mb_port_set_isolation(struct realtek_priv *priv, int port,
@@ -2003,7 +1999,6 @@ static int rtl8365mb_detect(struct realtek_priv *priv)
 		mb->priv = priv;
 		mb->chip_id = chip_id;
 		mb->chip_ver = chip_ver;
-		mb->learn_limit_max = RTL8365MB_LEARN_LIMIT_MAX;
 		mb->jam_table = rtl8365mb_init_jam_8365mb_vc;
 		mb->jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc);