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/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c
index 5b2ea8a..9098c86 100644
--- a/drivers/gpu/drm/radeon/rv770_dpm.c
+++ b/drivers/gpu/drm/radeon/rv770_dpm.c
@@ -2281,9 +2281,6 @@
 				  power_info->pplib.ucNumStates, GFP_KERNEL);
 	if (!rdev->pm.dpm.ps)
 		return -ENOMEM;
-	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 < power_info->pplib.ucNumStates; i++) {
 		power_state = (union pplib_power_state *)
@@ -2361,6 +2358,10 @@
 	pi->min_vddc_in_table = 0;
 	pi->max_vddc_in_table = 0;
 
+	ret = r600_get_platform_caps(rdev);
+	if (ret)
+		return ret;
+
 	ret = rv7xx_parse_power_table(rdev);
 	if (ret)
 		return ret;