drm/amdgpu: make sure to reserve tmr region on all asics which support it

This includes older APUs like renoir.
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1973,7 +1973,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 	 * If IP discovery enabled, a block of memory should be
 	 * reserved for IP discovey.
 	 */
-	if (adev->asic_type >= CHIP_NAVI10 && amdgpu_discovery) {
+	if (adev->discovery_bin) {
 		r = amdgpu_ttm_reserve_tmr(adev);
 		if (r)
 			return r;