intel/tools: Support multiple contexts in intel_dump_gpu.
Remove the 1:1 mapping between GGTT and physical addresses, and allocate a new ring/context as requested by GEM_CONTEXT_CREATE.
/cc @llandwerlin
Remove the 1:1 mapping between GGTT and physical addresses, and allocate a new ring/context as requested by GEM_CONTEXT_CREATE.
/cc @llandwerlin