* si5351: add support for si5351
Adds support for the si5351 I2C programmable clock generator using code
from @chiefMarlin which used code from @conotto which somehow never got merged.
Thank you everyone!
Signed-off-by: deadprogram <ron@hybridgroup.com>
* refactor: use regmap instead of legacy package to avoid heap allocations
Signed-off-by: deadprogram <ron@hybridgroup.com>
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Signed-off-by: deadprogram <ron@hybridgroup.com>