msm: mdss: dp: remove programming of maud/naud for audio

Remove the programming of the maud/naud values, and rely
entirely of the hardware selection logic to calculate
the maud/naud and the resultant audio clock frequency.
This is the recommended pratice as it leverages existing
hardware logic and avoids errors due to over/under
compensating the audio clock frequency.

Change-Id: Ic756deeabeb0eaaf95e5354b565cf20a85fd7cca
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>