LoongArch: KVM: Remove unnecessary CSR register saving during enter guest

Some CSR registers like CRMD/PRMD are saved during enter VM mode now.
However they are not restored for actual use, so saving for these CSR
registers can be removed.

Reviewed-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
1 file changed