ALSA: usb-audio: Rename ALSA kcontrol PCM and PCM1 for the KTMicro sound card

PCM1 not in Pulseaudio's control list; standardize control to
"Speaker" and "Headphone".

Signed-off-by: wangdicheng <wangdicheng@kylinos.cn>
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20250613063636.239683-1-wangdich9700@163.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>