drm/amd: Move AMD_IS_APU check for ASPM into top level function

There is no need for every ASIC driver to perform the same check.
Move the duplicated code into amdgpu_device_should_use_aspm().

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1496,6 +1496,8 @@ bool amdgpu_device_should_use_aspm(struct amdgpu_device *adev)
 	default:
 		return false;
 	}
+	if (adev->flags & AMD_IS_APU)
+		return false;
 	return pcie_aspm_enabled(adev->pdev);
 }