hal: add support for pcm_ioctl() api

- Tinyalsa doesn't expose an api to call
  ioctls exposed by the audio drivers.
- Add pcm_ioctl() api to support pcm ioctl.

Change-Id: I448252e8d3347257a73c56bc8ed341abc2dd2dab
Merge pull request #1 from omnirom/android-4.4

hal: add support for pcm_ioctl() api