KVM: VMX: remove unneeded 'asm volatile ("")' from vmcs_write64

__vmcs_writel uses volatile asm, so there is no need to insert another
one between the first and the second call to __vmcs_writel in order
to prevent unwanted code moves for 32bit targets.
Signed-off-by: NUros Bizjak <ubizjak@gmail.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/ops.h

@@ -146,7 +146,6 @@ static __always_inline void vmcs_write64(unsigned long field, u64 value)
 
 	__vmcs_writel(field, value);
 #ifndef CONFIG_X86_64
-	asm volatile ("");
 	__vmcs_writel(field+1, value >> 32);
 #endif
 }