bytcht-es8316: Fix missing including of HeadPhones.conf after ucm2 conversion

bytcht-es8316: Fix missing including of HeadPhones.conf after ucm2 conversion

The conversion to ucm2 format missed adding an include for:

codecs/es8316/HeadPhones.conf

Leading to no sound on the headphones output, this commit adds the missing
include fixing this.

Cc: youling 257 <youling257@gmail.com>
Reported-by: youling 257 <youling257@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>