amd/powerplay: disable powerplay by default initially

BugLink: http://bugs.launchpad.net/bugs/1546572

Hopefully we can enable this by default once we get more
upstream feedback on stability, etc.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 53d8eabe)
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

@@ -100,7 +100,7 @@ static int amdgpu_pp_early_init(void *handle)
 	switch (adev->asic_type) {
 		case CHIP_TONGA:
 		case CHIP_FIJI:
-			adev->pp_enabled = (amdgpu_powerplay == 0) ? false : true;
+			adev->pp_enabled = (amdgpu_powerplay > 0) ? true : false;
 			break;
 		default:
 			adev->pp_enabled = (amdgpu_powerplay > 0) ? true : false;