drm/amdgpu/runpm: enable runpm on baco capable VI+ asics

Seems to work reliably on VI+ except for a few so enable runpm barring
those where baco for runtime power management is not supported.

[rajneesh] Picked https://patchwork.freedesktop.org/patch/335402/ to
enable runtime pm with baco for kfd. Also fixed a checkpatch warning and
added extra checks for VEGA20 and ARCTURUS.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -170,10 +170,16 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
 	}
 
 	if (amdgpu_device_supports_boco(dev) &&
-	    (amdgpu_runtime_pm != 0)) /* enable runpm by default */
+	    (amdgpu_runtime_pm != 0)) /* enable runpm by default for boco */
 		adev->runpm = true;
 	else if (amdgpu_device_supports_baco(dev) &&
-		 (amdgpu_runtime_pm > 0)) /* enable runpm if runpm=1 */
+		 (amdgpu_runtime_pm != 0) &&
+		 (adev->asic_type >= CHIP_TOPAZ) &&
+		 (adev->asic_type != CHIP_VEGA20) &&
+		 (adev->asic_type != CHIP_ARCTURUS)) /* enable runpm on VI+ */
+		adev->runpm = true;
+	else if (amdgpu_device_supports_baco(dev) &&
+		 (amdgpu_runtime_pm > 0))  /* enable runpm if runpm=1 on CI */
 		adev->runpm = true;
 
 	/* Call ACPI methods: require modeset init