ARM: meson: enable MESON_IRQ_GPIO also for MACH_MESON8

Now that the GPIO interrupt controller also supports the Meson8 SoCs we
can enable it via Kconfig.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/mach-meson/Kconfig

@@ -23,6 +23,7 @@ config MACH_MESON8
 	default ARCH_MESON
 	select MESON6_TIMER
 	select COMMON_CLK_MESON8B
+	select MESON_IRQ_GPIO
 
 config MACH_MESON8B
 	bool "Amlogic Meson8b SoCs support"