ASoC: hdac_hda: Fix error in driver removal after failed probe

In case system has multiple HDA codecs, and codec probe fails for
at least one but not all codecs, driver will end up cancelling
a non-initialized timer context upon driver removal.

Call trace of typical case:

[   60.593646] WARNING: CPU: 1 PID: 1147 at kernel/workqueue.c:3032
__flush_work+0x18b/0x1a0
[...]
[   60.593670]  __cancel_work_timer+0x11f/0x1a0
[   60.593673]  hdac_hda_dev_remove+0x25/0x30 [snd_soc_hdac_hda]
[   60.593674]  device_release_driver_internal+0xe0/0x1c0
[   60.593675]  bus_remove_device+0xd6/0x140
[   60.593677]  device_del+0x175/0x3e0
[   60.593679]  ? widget_tree_free.isra.7+0x90/0xb0 [snd_hda_core]
[   60.593680]  snd_hdac_device_unregister+0x34/0x50 [snd_hda_core]
[   60.593682]  snd_hdac_ext_bus_device_remove+0x2a/0x60 [snd_hda_ext_core]
[   60.593684]  hda_dsp_remove+0x26/0x100 [snd_sof_intel_hda_common]
[   60.593686]  snd_sof_device_remove+0x84/0xa0 [snd_sof]
[   60.593687]  sof_pci_remove+0x10/0x30 [snd_sof_pci]
[   60.593689]  pci_device_remove+0x36/0xb0

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200110235751.3404-9-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>