hal: Avoid setting wrong sample rate for headset device

On internal codec, headset is shared same backend with
speaker or handset. platform_check_codec_backend_cfg is
wrongly setting backend sample rate to 48 KHz for headset
when using native playback or hifi audio.

Avoid setting sample rate to default sample rate for headset.

CRs-Fixed: 2398845
Change-Id: Ia8e1831292370f8648e145e0aa715ab9471d3a71