media: msm_vidc: Add hardware interface for video core.

- Provides hardware level interface to perform video encoding
  and decoding.
- Implements interrupt handling and processing for video core.
- Packages data to core readable format and processes response from core.

Change-Id: Ie16796449d2aacf331c7e02b3f0a63175cc5d37b
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>