net: phy: make .ack_interrupt() optional

As a first step into making phylib and all PHY drivers to actually
have support for shared IRQs, make the .ack_interrupt() callback
optional.

After all drivers have been moved to implement the generic
interrupt handle, the phy_drv_supports_irq() check will be
changed again to only require the .handle_interrupts() callback.

Cc: Alexandru Ardelean <[email protected]>
Cc: Andre Edich <[email protected]>
Cc: Antoine Tenart <[email protected]>
Cc: Baruch Siach <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Dan Murphy <[email protected]>
Cc: Divya Koppera <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: Hauke Mehrtens <[email protected]>
Cc: Heiner Kallweit <[email protected]>
Cc: Jerome Brunet <[email protected]>
Cc: Kavya Sree Kotagiri <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Marco Felsch <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Martin Blumenstingl <[email protected]>
Cc: Mathias Kresin <[email protected]>
Cc: Maxim Kochetkov <[email protected]>
Cc: Michael Walle <[email protected]>
Cc: Neil Armstrong <[email protected]>
Cc: Nisar Sayed <[email protected]>
Cc: Oleksij Rempel <[email protected]>
Cc: Philippe Schenker <[email protected]>
Cc: Willy Liu <[email protected]>
Cc: Yuiko Oshino <[email protected]>
Signed-off-by: Ioana Ciornei <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

0 files changed, 0 insertions, 0 deletions