ALSA: scarlett2: Fix scarlett2_*_ctl_put() return values again

ALSA: scarlett2: Fix scarlett2_*_ctl_put() return values again

Mixer control put callbacks should return 1 if the value is changed.
Fix the mute, air, phantom, direct monitor, speaker switch, talkback,
and MSD controls accordingly.

Fix scarlett2_speaker_switch_enable() to not ignore the return value
of scarlett2_sw_hw_change().

Reported-by: Aaron Wolf <aaron@wolftune.com>
Tested-by: Aaron Wolf <aaron@wolftune.com>
Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Link: https://lore.kernel.org/r/76643f7ac81aef93351122d07881e30d51dcb1b9.1624798436.git.g@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>