ASoC: stm32: do not request a new clock consummer reference

This reverts commit 65d1cce7.

There is problem with clk_hw_get_hw(). Using it pins the clock provider to
itself, making it impossible to remove the module.

Revert commit 65d1cce7

 ("ASoC: stm32: properly get clk from the
provider") until this gets sorted out.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210428122632.46244-2-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>