ASoC: rt5640: Update MCLK rate in set_sysclk()

ASoC: rt5640: Update MCLK rate in set_sysclk()

Simple-card/audio-graph-card drivers do not handle MCLK clock when it
is specified in the codec device node. The expectation here is that,
the codec should actually own up the MCLK clock and do necessary setup
in the driver.

This is inspired from,
commit dbf54a953435 ("ASoC: rt5659: Update MCLK rate in set_sysclk()").

Cc: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/1675953417-8686-2-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>