ASoC: alc5632: Fix Capture/Playback attributes for microphone inputs

According to the mixer path diagram input sources' attenuators logically
belong to the playback path and DMIC boost only affects capture.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Signed-off-by: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>