cpufreq: amd_freq_sensitivity: Mark sometimes used ID structs as __maybe_unused

ot used when MODULE is not defined.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/amd_freq_sensitivity.c:147:32: warning: ‘amd_freq_sensitivity_ids’ defined but not used [-Wunused-const-variable=]
 147 | static const struct x86_cpu_id amd_freq_sensitivity_ids[] = {
 | ^~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/amd_freq_sensitivity.c

@@ -144,7 +144,7 @@ static void __exit amd_freq_sensitivity_exit(void)
 }
 module_exit(amd_freq_sensitivity_exit);
 
-static const struct x86_cpu_id amd_freq_sensitivity_ids[] = {
+static const struct x86_cpu_id __maybe_unused amd_freq_sensitivity_ids[] = {
 	X86_MATCH_FEATURE(X86_FEATURE_PROC_FEEDBACK, NULL),
 	{}
 };