arm64: defconfig: Enable SMMU v3 PMCG

HiSilicon Kunpeng920 SoC's SMMU has Performance Monitor Counter Groups(PMCG).
This patch enables related driver in defconfig.

Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>