ASoC: tas2562: Fix sample rate error message

Fix error message for setting the sample rate.  It says bitwidth but
should say sample rate.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200226130305.12043-3-dmurphy@ti.com


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