nx2: support mapping modify so NVN2 places compressible textures

NVN2 gives a texture in a compressible memory pool its GPU address only
after NvRmGpuMappingModify switched the pool's mapping to the texture's
kind. NvRm fails that call unless the GPU characteristics report
NVGPU_GPU_FLAGS_SUPPORT_MAPPING_MODIFY, so such textures kept address 0
and draws into them went nowhere: title 1's cup-opening movie stayed on
its first frame (also its 640x360 and 512x512 passes).

Report the flag and answer the request nn::gpu::sdk then sends, gpu
sub-session 212 (NormalModifyMemoryKind4K), with the wanted kind and a
signalled job slot. The movie now plays on screen and the race follows.

0 files changed, 0 insertions, 0 deletions