KVM: x86 emulator: implement MMX MOVQ (opcodes 0f 6f, 0f 7f)

Needed by some framebuffer drivers.  See

https://bugzilla.kernel.org/show_bug.cgi?id=42779

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

arch/x86/kvm/emulate.c

@@ -3488,7 +3488,7 @@ static struct opcode group11[] = {
 };
 
 static struct gprefix pfx_0f_6f_0f_7f = {
-	N, I(Sse | Aligned, em_mov), N, I(Sse | Unaligned, em_mov),
+	I(Mmx, em_mov), I(Sse | Aligned, em_mov), N, I(Sse | Unaligned, em_mov),
 };
 
 static struct gprefix pfx_vmovntpx = {