net: mii: constify advertising mask

Constify the advertising mask to linkmode functions that only read from
the advertising mask.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Russell King (Oracle)

include/linux/mii.h

@@ -140,7 +140,7 @@ static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
  * settings to phy autonegotiation advertisements for the
  * MII_ADVERTISE register.
  */
-static inline u32 linkmode_adv_to_mii_adv_t(unsigned long *advertising)
+static inline u32 linkmode_adv_to_mii_adv_t(const unsigned long *advertising)
 {
 	u32 result = 0;
 
@@ -215,7 +215,8 @@ static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
  * settings to phy autonegotiation advertisements for the
  * MII_CTRL1000 register when in 1000T mode.
  */
-static inline u32 linkmode_adv_to_mii_ctrl1000_t(unsigned long *advertising)
+static inline u32
+linkmode_adv_to_mii_ctrl1000_t(const unsigned long *advertising)
 {
 	u32 result = 0;
 
@@ -453,7 +454,7 @@ static inline void mii_ctrl1000_mod_linkmode_adv_t(unsigned long *advertising,
  * A small helper function that translates linkmode advertising to LVL
  * pause capabilities.
  */
-static inline u32 linkmode_adv_to_lcl_adv_t(unsigned long *advertising)
+static inline u32 linkmode_adv_to_lcl_adv_t(const unsigned long *advertising)
 {
 	u32 lcl_adv = 0;