arch: arm: update Kconfig to select IRQ when GIC_V3_ITS is enabled

GIC_V3_ITS uses UCLASS_IRQ driver. Update Kconfig to select
IRQ when GIC_V3_ITS is enabled.
Signed-off-by: NWasim Khan <wasim.khan@nxp.com>
Reviewed-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Tested-by: NVladimir Oltean <vladimir.oltean@nxp.com>

arch/arm/Kconfig

@@ -67,6 +67,7 @@ config GIC_V3_ITS
 	bool "ARM GICV3 ITS"
 	select REGMAP
 	select SYSCON
+	select IRQ
 	help
 	  ARM GICV3 Interrupt translation service (ITS).
 	  Basic support for programming locality specific peripheral