tools/power/turbostat: Improve probe_platform_features() logic

AMD/Hygon platforms that don't have RAPL use 'amd_features' to describe
the platform features. Unknown Intel platforms use 'default_features' to
describe the platform features.

As none of the platform feature is set for 'amd_features' or
'default_features', there is no need to maintain both of them.

Remove 'amd_features' structure and improve the logic in
probe_platform_features().

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>

tools/power/x86/turbostat/turbostat.c

@@ -767,9 +767,6 @@ static const struct platform_features knl_features = {
 static const struct platform_features default_features = {
 };
 
-static const struct platform_features amd_features = {
-};
-
 static const struct platform_features amd_features_with_rapl = {
 	.rapl_msrs = RAPL_AMD_F17H,
 	.has_per_core_rapl = 1,
@@ -849,9 +846,9 @@ void probe_platform_features(unsigned int family, unsigned int model)
 {
 	int i;
 
-	if (authentic_amd || hygon_genuine) {
-		platform = &amd_features;
+	platform = &default_features;
 
+	if (authentic_amd || hygon_genuine) {
 		if (max_extended_level >= 0x80000007) {
 			unsigned int eax, ebx, ecx, edx;
 
@@ -863,8 +860,6 @@ void probe_platform_features(unsigned int family, unsigned int model)
 		return;
 	}
 
-	platform = &default_features;
-
 	if (!genuine_intel || family != 6)
 		return;