drivers: dai: intel: ssp: Refactor TLV parsing into a separate function

Refactor the TLV parsing code from the dai_ssp_parse_aux_data function
into a new, separate function called dai_ssp_parse_tlv. This change
improves the modularity of the code and allows for the TLV parsing logic
to be reused in other contexts where only TLV data needs to be parsed
without the entire configuration blob.

The new dai_ssp_parse_tlv function takes a pointer to the TLV data and
its length as parameters, enabling it to process a buffer containing
multiple TLV entries. The original dai_ssp_parse_aux_data function is
now simplified to prepare the TLV data and call the new parsing
function.

Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>