platform/x86: asus-wmi: Fix the name of the mic-mute LED classdev

According to well-known-leds.txt, we should use "platform::micmute"
instead of "asus::micmute" for the name of the mic-mute LED classdev.

Signed-off-by: PaddyKP_Yao <PaddyKP_Yao@asus.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220825004305.709539-1-PaddyKP_Yao@asus.com


Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>