drm/radeon/dpm: move platform caps fetching to a separate function

It's needed by by both the asic specific functions and the
extended table parser.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
index 8d49104..4a0c401 100644
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -4959,9 +4959,6 @@
 	if (!rdev->pm.dpm.ps)
 		return -ENOMEM;
 	power_state_offset = (u8 *)state_array->states;
-	rdev->pm.dpm.platform_caps = le32_to_cpu(power_info->pplib.ulPlatformCaps);
-	rdev->pm.dpm.backbias_response_time = le16_to_cpu(power_info->pplib.usBackbiasTime);
-	rdev->pm.dpm.voltage_response_time = le16_to_cpu(power_info->pplib.usVoltageTime);
 	for (i = 0; i < state_array->ucNumEntries; i++) {
 		u8 *idx;
 		power_state = (union pplib_power_state *)power_state_offset;
@@ -5077,6 +5074,12 @@
 		ci_dpm_fini(rdev);
 		return ret;
 	}
+
+	ret = r600_get_platform_caps(rdev);
+	if (ret) {
+		ci_dpm_fini(rdev);
+		return ret;
+	}
 	ret = ci_parse_power_table(rdev);
 	if (ret) {
 		ci_dpm_fini(rdev);