ASoC: Intel: Skylake: free codec objects on removal

On driver removal we should ask the core to remove the device
objects as well, so invoke snd_hdac_ext_bus_device_remove() in
remove.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl.c

@@ -725,6 +725,10 @@ static void skl_remove(struct pci_dev *pci)
 	if (pci_dev_run_wake(pci))
 		pm_runtime_get_noresume(&pci->dev);
 	pci_dev_put(pci);
+
+	/* codec removal, invoke bus_device_remove */
+	snd_hdac_ext_bus_device_remove(ebus);
+
 	skl_platform_unregister(&pci->dev);
 	skl_free_dsp(skl);
 	skl_machine_device_unregister(skl);