ASoC: h1940_uda1380: Don't modify runtime->hw

Individual components are not supposed to modify the runtime->hw struct itself
as it is manged by the ASoC core. If a component wants to limit the list of
supported rates it should set a rate constraint. The h1940_uda1380 already does
this, so it is safe to just remove the code that modifies runtime->hw.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>