ASoC: msm: Fix mute issue in LPA

In event of an under-run, driver is not able to start again.
Memset the buffer to play silence while userspace recieves the
next set of data and copies it into the mmap buffer.

Change-Id: I0ccbe674defbdad638ce5d4378e18d0428003bb0
CRs-Fixed: 356297
CRs-Fixed: 359764
Signed-off-by: Tejas Shikhare <tshikhar@codeaurora.org>
1 file changed