asoc: sm6150: Add logic to parse codec_max_aux_devs

Add parsing logic for codec_max_aux_devs in init_aux_dev
in order to identify whether auxilary codec is supported
or not for a target.

CRs-Fixed: 2353292
Change-Id: I88a84ab064da50ab243ad3f7d6b61cd03b9bbc77
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>