Create a mes process which contains process-related resources,
like vm, doorbell bitmap, process ctx bo and etc.

v2: move the simple variable to the end
Signed-off-by: NJack Xiao <Jack.Xiao@amd.com>
Acked-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>