sm8x50: mixer_paths: Enable sm8550hdk on-board Speakers am: 66e558c563 am: 8b79df6e30

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/3177720

Change-Id: Icbe5d0265ca64af4b9374a9386f1d445c39d34b8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>