realtek: 5.15: fix warning for i2c_mii_valid_phy_id and i2c_mii_phy_addr

Rework exposing i2c_mii_valid_phy_id and i2c_mii_phy_addr in global
include.
Fix compilation warning:
In file included from drivers/net/phy/sfp.c:11:
./include/linux/mdio/mdio-i2c.h:27:21: error: 'i2c_mii_phy_addr' defined but not used [-Werror=unused-function]
   27 | static unsigned int i2c_mii_phy_addr(int phy_id)
      |                     ^~~~~~~~~~~~~~~~
./include/linux/mdio/mdio-i2c.h:22:13: error: 'i2c_mii_valid_phy_id' defined but not used [-Werror=unused-function]
   22 | static bool i2c_mii_valid_phy_id(int phy_id)
      |             ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Signed-off-by: Christian Marangi <[email protected]>

target/linux/realtek/patches-5.15/711-net-phy-add-an-MDIO-SMBus-library.patch

@@ -120,49 +120,29 @@ Signed-off-by: Antoine Tenart <[email protected]>
  
 --- a/include/linux/mdio/mdio-i2c.h
 +++ b/include/linux/mdio/mdio-i2c.h
-@@ -12,5 +12,21 @@ struct i2c_adapter;
+@@ -12,5 +12,8 @@ struct i2c_adapter;
  struct mii_bus;
  
  struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c);
 +struct mii_bus *mdio_smbus_alloc(struct device *parent, struct i2c_adapter *i2c);
-+
-+/*
-+ * I2C bus addresses 0x50 and 0x51 are normally an EEPROM, which is
-+ * specified to be present in SFP modules.  These correspond with PHY
-+ * addresses 16 and 17.  Disallow access to these "phy" addresses.
-+ */
-+static bool i2c_mii_valid_phy_id(int phy_id)
-+{
-+	return phy_id != 0x10 && phy_id != 0x11;
-+}
-+
-+static unsigned int i2c_mii_phy_addr(int phy_id)
-+{
-+	return phy_id + 0x40;
-+}
++bool i2c_mii_valid_phy_id(int phy_id);
++unsigned int i2c_mii_phy_addr(int phy_id);
  
  #endif
 --- a/drivers/net/mdio/mdio-i2c.c
 +++ b/drivers/net/mdio/mdio-i2c.c
-@@ -13,21 +13,6 @@
- #include <linux/mdio/mdio-i2c.h>
- #include <linux/phy.h>
- 
--/*
-- * I2C bus addresses 0x50 and 0x51 are normally an EEPROM, which is
-- * specified to be present in SFP modules.  These correspond with PHY
-- * addresses 16 and 17.  Disallow access to these "phy" addresses.
-- */
+@@ -18,12 +18,12 @@
+  * specified to be present in SFP modules.  These correspond with PHY
+  * addresses 16 and 17.  Disallow access to these "phy" addresses.
+  */
 -static bool i2c_mii_valid_phy_id(int phy_id)
--{
--	return phy_id != 0x10 && phy_id != 0x11;
--}
--
++bool i2c_mii_valid_phy_id(int phy_id)
+ {
+ 	return phy_id != 0x10 && phy_id != 0x11;
+ }
+ 
 -static unsigned int i2c_mii_phy_addr(int phy_id)
--{
--	return phy_id + 0x40;
--}
--
- static int i2c_mii_read(struct mii_bus *bus, int phy_id, int reg)
++unsigned int i2c_mii_phy_addr(int phy_id)
  {
- 	struct i2c_adapter *i2c = bus->priv;
+ 	return phy_id + 0x40;
+ }