net: phy: improve struct phy_device member interrupts handling

As a heritage from the very early days of phylib member interrupts is
defined as u32 even though it's just a flag whether interrupts are
enabled. So we can change it to a bitfield member. In addition change
the code dealing with this member in a way that it's clear we're
dealing with a bool value.

Signed-off-by: Heiner Kallweit <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Reviewed-by: Florian Fainelli <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/phy/phy.c

···
  *
  * Returns 0 on success or < 0 on error.
  */
-static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
+static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
 {
-	phydev->interrupts = interrupts;
+	phydev->interrupts = interrupts ? 1 : 0;
 	if (phydev->drv->config_intr)
 		return phydev->drv->config_intr(phydev);
 

include/linux/phy.h

···
 void devm_mdiobus_free(struct device *dev, struct mii_bus *bus);
 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
 
-#define PHY_INTERRUPT_DISABLED	0x0
-#define PHY_INTERRUPT_ENABLED	0x80000000
+#define PHY_INTERRUPT_DISABLED	false
+#define PHY_INTERRUPT_ENABLED	true
 
 /* PHY state machine states:
  *
···
 	/* The most recently read link state */
 	unsigned link:1;
 
+	/* Interrupts are enabled */
+	unsigned interrupts:1;
+
 	enum phy_state state;
 
 	u32 dev_flags;
···
 	int duplex;
 	int pause;
 	int asym_pause;
-
-	/* Enabled Interrupts */
-	u32 interrupts;
 
 	/* Union of PHY and Attached devices' supported modes */
 	/* See mii.h for more info */