ASoC: wcd934x: set up path from MAD to slimbus for wcd934x codec

To support ADSP SVA with wcd934x codec, audio codec path needs to
be set up from MAD module to slimbus port. Establish the path and
reserve the slimbus TX13 port for it.

CRs-Fixed: 1070327
Change-Id: I4cc20bd7070a51a121a0da33c9b30233443bb543
Signed-off-by: Walter Yang <yandongy@codeaurora.org>