[PATCH v3] ASoC: da7219: Fix change notifications for tone generator frequency

[Adam Thomson]

On 20 April 2022 14:35, Mark Brown wrote:

> The tone generator frequency control just returns 0 on successful write,
> not a boolean value indicating if there was a change or not.  Compare
> what was written with the value that was there previously so that
> notifications are generated appropriately when the value changes.
> 
> Signed-off-by: Mark Brown <broonie at kernel.org>

Reviewed-by: Adam Thomson <Adam.Thomson.Opensource at diasemi.com>