net: phy: micrel: fix interrupt handling

After migration to the shared interrupt support, the KSZ8031 PHY with
enabled interrupt support was not able to notify about link status
change.

Fixes: 59ca4e58b917 ("net: phy: micrel: implement generic .handle_interrupt() callback")
Signed-off-by: Oleksij Rempel <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/phy/micrel.c

···
 		return IRQ_NONE;
 	}
 
-	if ((irq_status & KSZPHY_INTCS_STATUS))
+	if (!(irq_status & KSZPHY_INTCS_STATUS))
 		return IRQ_NONE;
 
 	phy_trigger_machine(phydev);