LoongArch: KVM: Add more CPUCFG mask bits

LoongArch: KVM: Add more CPUCFG mask bits

With new CPU cores there are more features supported which are indicated
in CPUCFG2 bits 24:30 and CPUCFG3 bits 17:23. The KVM hypervisor cannot
enable or disable (most of) these features and there is no KVM exception
when instructions of these features are executed in guest mode.

Here add more CPUCFG mask support with LA664 CPU type.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>