ASoC: hdmi-codec: Add an op to set callback function for plug event

mainline inclusion
from mainline-v5.4-rc1
commit 6fa5963c
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7QJML


CVE: NA

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Add an op in hdmi_codec_ops so codec driver can register callback
function to handle plug event.

Driver in DRM can use this callback function to report connector status.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Link: https://lore.kernel.org/r/20190717083327.47646-2-cychiang@chromium.org


Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Conflicts:
	[lishuo: adjust context]
Signed-off-by: lishuo <lishuo@phytium.com.cn>