mm-audio: aud_acdb_util: Fix ADM custom topology

When AANC was added an enum was changed that affected ADM
custom topology and TX audproc vol cal. If ADM custom
topology was used the memmap handle for TX audproc volume
would be overwritten. This fixes that logic.

Change-Id: I8c0a13d0a3c0359537508b7ca9a34faf8cd267b4
CRs-fixed: 515406
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>