ASoC: cs4265: SOC_SINGLE register value error fix

The cs4265 driver declares the "MMTLR Data Switch" register setting with
a 0 register value rather then the 0x12 register (CS4265_SPDIF_CTL2).
This incorrect value causes alsamixer to fault with the output :
cannot load mixer controls: Input/output error

This patch corrects the register value. alsamixer now runs.

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