ASoC: mx27vis-aic32x4: Remove unused driver

Since commit 879c0e5e

 ("ARM: imx: Remove i.MX27 board files"), the
MACH_IMX27_VISSTRIM_M10 non-DT platform is no longer supported,
so get rid of its machine audio driver too.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20201110203937.25684-2-festevam@gmail.com


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