cpufreq: intel_pstate: Support Clearwater Forest OOB mode

JIRA: https://issues.redhat.com/browse/RHEL-110833

commit 3ead779
Author: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date:   Fri Aug 8 07:51:22 2025 -0700

    cpufreq: intel_pstate: Support Clearwater Forest OOB mode

    Prevent intel_pstate from loading when OOB (Out Of Band) P-states mode is
    enabled.

    Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Link: https://patch.msgid.link/20250808145122.4057208-1-srinivas.pandruvada@linux.intel.com
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Signed-off-by: Steve Best <sbest@redhat.com>

Author: sfbest

drivers/cpufreq/intel_pstate.c

@@ -2804,6 +2804,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
 	X86_MATCH(INTEL_GRANITERAPIDS_X,	core_funcs),
 	X86_MATCH(INTEL_ATOM_CRESTMONT,		core_funcs),
 	X86_MATCH(INTEL_ATOM_CRESTMONT_X,	core_funcs),
+	X86_MATCH(INTEL_ATOM_DARKMONT_X,	core_funcs),
 	{}
 };
 #endif