ASoC: madera: Fix event generation for rate controls

ASoC: madera: Fix event generation for rate controls

[ Upstream commit dfd81cf9344cd07a1a6c800410ad75b1bd5c7137 ]

madera_adsp_rate_put always returns zero regardless of if the control
value was updated. This results in missing notifications to user-space
of the control change. Update the handling to return 1 when the
value is changed.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220623105120.1981154-5-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>