drm/amdgpu: enable powerplay module by default for tonga.

BugLink: http://bugs.launchpad.net/bugs/1546572Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 76c8cc6b)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

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

@@ -96,6 +96,14 @@ static int amdgpu_pp_early_init(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int ret = 0;
 
+	switch (adev->asic_type) {
+		case CHIP_TONGA:
+			amdgpu_powerplay = 1;
+			break;
+		default:
+			break;
+	}
+
 	ret = amdgpu_powerplay_init(adev);
 	if (ret)
 		return ret;