UPSTREAM: ASoC: wm2200: use snd_soc_codec_get_drvdata()

snd_soc_codec_get_drvdata() is common function to get
private data. Let's use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit ac769ab1)

BUG=b:110025789
TEST=Test Audio use cases with full SOF 0.6 rebase release series applied.

Change-Id: I3007d8fad75fd52402b267318c5dd8f935cd3490
Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1410702


Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Kamal Ap <kamal.ap@intel.com>