x86/kvm: Always inline vmload() / vmsave()

vmlinux.o: warning: objtool: svm_vcpu_enter_exit()+0xea: call to vmload() leaves .noinstr.text section
vmlinux.o: warning: objtool: svm_vcpu_enter_exit()+0x133: call to vmsave() leaves .noinstr.text section

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210624095147.942250748@infradead.org