sm/controller: Increase PointerBufferSize

This increases the PointerBufferSize as a lager one is required by some services.
This change is still not hw-accurate, but it is proven to work in Ryujinx.

Instead of using a hardcoded size, we should figure out the specific values for each service in the future. Some of them can be taken from Atmosphere: https://github.com/Atmosphere-NX/Atmosphere/search?q=PointerBufferSize.