x86/mwait-idle: add Icelake-D support

This patch adds Icelake Xeon D support to the intel_idle driver.

Since Icelake D and Icelake SP C-state characteristics the same,
we use Icelake SP C-states table for Icelake D as well.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[Linux commit: 22141d5f411895bb1b0df2a6b05f702e11e63918]
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>

xen/arch/x86/cpu/mwait-idle.c

@@ -990,6 +990,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconstrel = {
 	ICPU(0x9e, skl),
 	ICPU(0x55, skx),
 	ICPU(0x6a, icx),
+	ICPU(0x6c, icx),
 	ICPU(0x57, knl),
 	ICPU(0x85, knl),
 	ICPU(0x5c, bxt),