MIPS: BCM63XX: let board specify an external GPIO to reset PHY

Some boards may need to reset their external PHY or switch they are
attached to, add a hook for doing this along with providing custom
linux/gpio.h flags for doing this.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Cc: Florian Fainelli <florian@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/5501/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/bcm63xx/boards/board_bcm963xx.c

@@ -883,5 +883,9 @@ int __init board_register_devices(void)
 
 	platform_device_register(&bcm63xx_gpio_leds);
 
+	if (board.ephy_reset_gpio && board.ephy_reset_gpio_flags)
+		gpio_request_one(board.ephy_reset_gpio,
+				board.ephy_reset_gpio_flags, "ephy-reset");
+
 	return 0;
 }