ASoC: stm: stm32_i2s: convert from round_rate() to determine_rate()

The round_rate() clk ops is deprecated, so migrate this driver from
round_rate() to determine_rate() using the Coccinelle semantic patch
on the cover letter of this series.

Signed-off-by: Brian Masney <bmasney@redhat.com>
Link: https://patch.msgid.link/20250710-sound-clk-round-rate-v1-5-4a9c3bb6ff3a@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>