ARM: mach-virt: Select PMUv3 driver by default

Since 32bit guests are not unlikely to run on an ARMv8 host,
let's select the PMUv3 driver, which allows the PMU to be used
on such systems.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Zaid Al-Bassam <zalbassam@google.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230317195027.3746949-9-zalbassam@google.com
Signed-off-by: Will Deacon <will@kernel.org>

Author: Marc Zyngier

arch/arm/Kconfig

@@ -401,6 +401,7 @@ config ARCH_VIRT
 	select ARM_GIC_V3
 	select ARM_GIC_V3_ITS if PCI
 	select ARM_PSCI
+	select ARM_PMUV3 if PERF_EVENTS
 	select HAVE_ARM_ARCH_TIMER
 
 config ARCH_AIROHA