msm: board-8930: Increase the PMEM size for audio

Increase the PMEM size for tunnel audio.

Current, PMEM size is not enough to accommodate
multiple Voice/VoLTE/VoIP calibration block.
This causes tunnel mode coder failed to allocate
the PMEM because it is taken by calibration block.

Change-Id: I92b8861101fb01793566cafc3e1cc949a672f96b
Signed-off-by: Vicky Sehrawat <vickys@codeaurora.org>