It increases the size of nv50_instobj objects that report the size of 0x3000.

Struct "nv50_instobj" has size of 0x3000 but it's parent structure
"nvkm_gpuobj" reports different size, a size of 0x97000.

All the other instances of nvkm_gpuobj and their child nv50_instobj report
similar size size to each other so they are fine.

It is a mystery to me why the sizes doesn't match, because if I understand
correctly the sizes are reported by the GPU itself.