KVM: VMX: Use kvm_set_msr_common() for MSR_IA32_TSC_ADJUST in the default way

MSR_IA32_TSC_ADJUST can be left to the default way which also uese
kvm_set_msr_common().

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211118110814.2568-7-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>