mwait-idle: support additional Broadwell model

Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
[Linux commit bea57077e44ec9c1e6d3a3c142c8a3c0289e290d]
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -683,6 +683,7 @@ static struct intel_idle_id {
 	ICPU(0x46, hsw),
 	ICPU(0x4d, avn),
 	ICPU(0x3d, bdw),
+	ICPU(0x47, bdw),
 	ICPU(0x4f, bdw),
 	ICPU(0x56, bdw),
 	{}