ASoC: codecs: wcd937x: fix AUX PA sequencing and mixer controls

ASoC: codecs: wcd937x: fix AUX PA sequencing and mixer controls

Enable AUX PA sequencing during AUX DAC DAPM events and keep the
AUX-specific RX supplies enabled while the path is active.

Add the missing AUX-related mixer controls, including CLSH PA and
DSD left/right switches, so AUX playback can be routed from userspace.

Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
Link: https://patch.msgid.link/20260420180221.785113-1-ajay.nandam@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>