tegra_mediaserver: Adding kernel media driver

tegra_mediaserver: Adding kernel media driver

This kernel driver will replace the functionality that was
previously in the NVRM daemon root process and allow multiple
instances of OpenMAX to function and AVP resource tracking and
cleanup.

Bug 772210

Change-Id: Ia5eb559cde4644bae5fd8b23a1de57cd65f3fdd8
Reviewed-on: http://git-master/r/25115
Tested-by: Stephen Holmes <sholmes@nvidia.com>
Reviewed-by: Stephen Holmes <sholmes@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>