ARM: 8463/1: Enable GICv2m on 32-bit virt machine

Modern qemu includes GICv2m support for both 64 and 32 bits, therefore
32-bit guests may also use MSI.
Signed-off-by: NPavel Fedin <p.fedin@samsung.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -797,6 +797,7 @@ config ARCH_VIRT
 	bool "Dummy Virtual Machine" if ARCH_MULTI_V7
 	select ARM_AMBA
 	select ARM_GIC
+	select ARM_GIC_V2M if PCI_MSI
 	select ARM_GIC_V3
 	select ARM_PSCI
 	select HAVE_ARM_ARCH_TIMER