net: dsa: ksz: Add reset GPIO handling
Add code to handle optional reset GPIO in the KSZ switch driver. The switch has a reset GPIO line which can be controlled by the CPU, so make sure it is configured correctly in such setups. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Cc: Woojung Huh <woojung.huh@microchip.com> Cc: David S. Miller <davem@davemloft.net> Cc: Tristram Ha <Tristram.Ha@microchip.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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