ASoC: msm: qdsp6: Add error check for memory commands

- Write failures observed during audio playback.
- Error checks are missing for memory map and memory unmap cmds,
  we are proceeding to write data even if memory map is failed. Due
  to this pcm_out_write failures are observed.
- Add proper error handling for memory map and unmap cmds.

CRs-Fixed: 409729
Signed-off-by: Deepa Madiregama <dmadireg@codeaurora.org>
Change-Id: Icf2857a2430bb890984298a3d755ae42f014ff05