GnmDriver: Add definitions for SetEmbeddedShader and DrawIndexAuto

[pipehuffer]

Also added comments describing the required number of DWORDs used by commands.

[pipehuffer]

Did a small change to this: there's now a definition for sceGnmDrawIndirect and OrbisGnmDrawIndexFlags was renamed to OrbisGnmDrawFlags since it's used by the former

[kiwidoggie]

I was comparing these arguments against GPCS4, seems to have different arguments there, have you checked that the arguments are correct?

[pipehuffer]

seems to have different arguments there

From a quick glance I found SetEmbeddedPsShader to be different, since it's missing the last argument in GPCS4 (I assume it's because it wasn't reversed by its author yet).
The flags argument is also different, being named pred from predicate. While OrbisGnmDrawFlags does indeed have a predicate field, it also has rendertargetsliceoffset which is supposed to be filled by the caller, although I haven't found anything using it so far in a base PS4.

I'll take this opportunity to add some more definitions to this patch and give its commit a more generic description.

[pipehuffer]

kiwidoggie reacted with thumbs up emoji

Sorry, didn't mean to say that I was working on more changes for this patch. It should be good to be merged as it is.