To my knowledge, all of the GameCube versions of *Metroid Prime* and *Metroid Prime 2: [Dark] Echoes* only support 4:3, not 16:9 .
Currently, Dolphin's widescreen heuristic will fail to detect this and will erratically switch between 4:3 and 16:9 when Aspect Ratio is set to Auto.
These changes prevent the erratic aspect ratio switching by manually declaring that the game is solely 4:3.
These games greatly benefit from CPU Culling, and there isn't much reason
not to just blanket enable it for all users. There is no case where you'd
want it disabled.
At least on Android, SyncGPU has really bad performance compared to
single core. It's less stable too - I get fatal GPU desyncs in
Pokémon XD using the default settings.
Fixes issues 8713 and 8674. Also disables scaled efb copies by default
for New Super Mario Bros to take advantage of the recent efb to texture
spinning coin fix.
