net: phy: micrel: always set shared->phydev for LAN8814

Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP
clock gets actually set, otherwise the function will return before setting
it.

This is an issue as shared->phydev is unconditionally being used when IRQ
is being handled, especially in lan8814_gpio_process_cap and since it was
not set it will cause a NULL pointer exception and crash the kernel.

So, simply always set shared->phydev to avoid the NULL pointer exception.

Fixes: b3f1a08fcf0d ("net: phy: micrel: Add support for PTP_PF_EXTTS for lan8814")
Signed-off-by: Robert Marko <[e-mail]>
Tested-by: Horatiu Vultur <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/phy/micrel.c

···
 {
 	struct lan8814_shared_priv *shared = phy_package_get_priv(phydev);
 
+	shared->phydev = phydev;
+
 	/* Initialise shared lock for clock*/
 	mutex_init(&shared->shared_lock);
 
···
 		return 0;
 
 	phydev_dbg(phydev, "successfully registered ptp clock\n");
-
-	shared->phydev = phydev;
 
 	/* The EP.4 is shared between all the PHYs in the package and also it
 	 * can be accessed by any of the PHYs