kmssink: add support for GBM allocator
Submitted by Randy Li (ayaka)
Created attachment 372542
In the Android, there is a similiar usuage with GPU memory, it use galloc() to allocate and access a memory from GPU.
There is a GBM support in -base, it doesn't include any memory operation.
This patch is verified with ARM MALI GPU library.
Patch 372542, "allocator":