drm/amd/pm: fix enum feature compared against 0

This less-than-zero comparison of an unsigned value is never true. feature < 0U
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c

@@ -760,7 +760,7 @@ static const char *__smu_feature_names[] = {
 static const char *smu_get_feature_name(struct smu_context *smu,
 					enum smu_feature_mask feature)
 {
-	if (feature < 0 || feature >= SMU_FEATURE_COUNT)
+	if (feature >= SMU_FEATURE_COUNT)
 		return "unknown smu feature";
 	return __smu_feature_names[feature];
 }