msm: audio: qdsp6v2: Fix DTS type3 playback issue

lpa_if_hdmi driver allocating total DMA buffer of 24KB, and total
no of buffers maintained is two. In case DTS type1 and DTS type2
each buffer size required is 4KB and 8KB. In this case total allocated
size of 24KB is sufficient for these types. But for DTS type3 we need
each buffer of size 16KB and total of 32KB. Since the allocated size 24KB
second DMA buffer is getting assigned with less than 16k and hence
observing the gaps in audio playback. Fix this issue by allocating
with maximum possible buffer size.

CRs-Fixed: 315976
Change-Id: Iebd3188b50cf29a68e0937855149380f23e9567f
Signed-off-by: Deepa Madiregama <dmadireg@codeaurora.org>