ARM: virt: Select ARM_GIC_V3_ITS

This patch allows ARM guests to use GICv3 ITS on an arm64 host
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

arch/arm/Kconfig

@@ -703,6 +703,7 @@ config ARCH_VIRT
 	select ARM_GIC
 	select ARM_GIC_V2M if PCI
 	select ARM_GIC_V3
+	select ARM_GIC_V3_ITS if PCI
 	select ARM_PSCI
 	select HAVE_ARM_ARCH_TIMER