The max98090 driver has some custom controls which share a put() function
which returns 0 unconditionally, meaning that events are not generated
when the value changes. Fix that.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220420193454.2647908-2-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
 
                mask << mc->shift,
                sel << mc->shift);
 
-       return 0;
+       return *select != val;
 }
 
 static const char *max98090_perf_pwr_text[] =