ASoC: imx-mc13783: Remove unused driver

The imx-mc13783 was used on imx27-pdk and imx31-pdk non-DT platforms.

Since 5.10-rc1, i.MX has been converted to a DT-only platform and all
board files are gone.

Remove the imx-mc13783 audio machine driver as there is no user at all.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20201110203937.25684-4-festevam@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>