ASoC: rename functions that pollute the simple_xxx namespace

include/linux/fs.h defines a bunch of simple fs helpers, (e.g.
simple_rename) and we intend to add an fs helper named simple_remove.

Rename the ASoC driver static functions, so they will not collide with
the upcoming fs helper function name.

Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>