ARM: bcm: Select ARM_GIC_V3 for ARCH_BRCMSTB

A number of recent Broadcom STB SoCs utilize a GIC-600 interrupt
controller thus requiring the use of the GICv3 driver.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Florian Fainelli <[email protected]>

arch/arm/mach-bcm/Kconfig

@@ -185,6 +185,7 @@ config ARCH_BRCMSTB
 	select ARCH_HAS_RESET_CONTROLLER
 	select ARM_AMBA
 	select ARM_GIC
+	select ARM_GIC_V3
 	select ARM_ERRATA_798181 if SMP
 	select HAVE_ARM_ARCH_TIMER
 	select ZONE_DMA if ARM_LPAE