ASoC: msm: qdsp6v2: Update routing and FE DAI drivers

Update routing driver with port mixer commands between
primary and secondary interfaces to enable AFE lopback
between them. Update FE DAI driver to add hostless FEs
for primary/secondary Auxpcm and secondary MI2S.

CRs-fixed: 2105222
Change-Id: I4bab442dae76d2a81f52883c4b0171253f6d9fe9
Signed-off-by: Viraja Kommaraju <virajak@codeaurora.org>