ramips: 6.1: ralink: fix const warning in the ethernet driver

Change fe_hw_set_macaddr and the set_mac parameter to const to fix
errors in the form of:

   drivers/net/ethernet/ralink/mtk_eth_soc.c: In function 'fe_set_mac_address':
  drivers/net/ethernet/ralink/mtk_eth_soc.c:174:53: error: passing argument 2 of 'priv->soc->set_mac' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
    174 |                         priv->soc->set_mac(priv, dev->dev_addr);
        |                                                  ~~~^~~~~~~~~~
  drivers/net/ethernet/ralink/mtk_eth_soc.c:174:53: note: expected 'unsigned char *' but argument is of type 'const unsigned char *'
  drivers/net/ethernet/ralink/mtk_eth_soc.c: In function 'fe_hw_init':
  drivers/net/ethernet/ralink/mtk_eth_soc.c:1220:45: error: passing argument 2 of 'priv->soc->set_mac' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
   1220 |                 priv->soc->set_mac(priv, dev->dev_addr);
        |                                          ~~~^~~~~~~~~~
  drivers/net/ethernet/ralink/mtk_eth_soc.c:1220:45: note: expected 'unsigned char *' but argument is of type 'const unsigned char *'
  drivers/net/ethernet/ralink/mtk_eth_soc.c:1222:44: error: passing argument 2 of 'fe_hw_set_macaddr' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
   1222 |                 fe_hw_set_macaddr(priv, dev->dev_addr);
        |                                         ~~~^~~~~~~~~~
  drivers/net/ethernet/ralink/mtk_eth_soc.c:155:75: note: expected 'unsigned char *' but argument is of type 'const unsigned char *'
    155 | static inline void fe_hw_set_macaddr(struct fe_priv *priv, unsigned char *mac)
        |                                                            ~~~~~~~~~~~~~~~^~~
  cc1: all warnings being treated as errors

Signed-off-by: Nick Hainke <[email protected]>

target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c

@@ -152,7 +152,7 @@ static inline void fe_int_enable(u32 mask)
 	fe_reg_r32(FE_REG_FE_INT_ENABLE);
 }
 
-static inline void fe_hw_set_macaddr(struct fe_priv *priv, unsigned char *mac)
+static inline void fe_hw_set_macaddr(struct fe_priv *priv, const unsigned char *mac)
 {
 	unsigned long flags;
 

target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h

@@ -378,7 +378,7 @@ struct fe_soc_data {
 	const u16 *reg_table;
 
 	void (*init_data)(struct fe_soc_data *data, struct net_device *netdev);
-	void (*set_mac)(struct fe_priv *priv, unsigned char *mac);
+	void (*set_mac)(struct fe_priv *priv, const unsigned char *mac);
 	int (*fwd_config)(struct fe_priv *priv);
 	void (*tx_dma)(struct fe_tx_dma *txd);
 	int (*switch_init)(struct fe_priv *priv);

target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c

@@ -107,7 +107,7 @@ static int mt7620_gsw_config(struct fe_priv *priv)
 	return 0;
 }
 
-static void mt7620_set_mac(struct fe_priv *priv, unsigned char *mac)
+static void mt7620_set_mac(struct fe_priv *priv, const unsigned char *mac)
 {
 	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
 	unsigned long flags;

target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3050.c

@@ -76,7 +76,7 @@ static void rt5350_init_data(struct fe_soc_data *data,
 	netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM;
 }
 
-static void rt5350_set_mac(struct fe_priv *priv, unsigned char *mac)
+static void rt5350_set_mac(struct fe_priv *priv, const unsigned char *mac)
 {
 	unsigned long flags;