ARM: dts: uniphier: Rename gpio-hog node

According to gpio-hog schema, should add the suffix "-hog" to the node
names including gpio-hog to fix the following warning.

  uniphier-pro4-ref.dtb: gpio@55000000: 'xirq2' does not match any of the regexes: '^.+-hog(-[0-9+)?$', 'pinctrl-[0-9]+'
      From schema: Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.yaml

This applies to the devicetree for LD4, LD6b, Pro4 and sLD8 SoCs.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/20220913042249.4708-5-hayashi.kunihiko@socionext.com

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>