libretro-snes9x2002: Add loading hacks from snesadvance.dat file

[tiopex]

Add loading hacks from snesadvance.dat file function from drPocketSnes emu

[Apaczer]

AFAIR the speedhacks may brake/reduce accuracy on some parts (by skipping some CPU cycles), so you would likely want to make it optional.
BTW there is dynarec code in snes9x2002 which may help with snes9x2005 (see https://git.crowdedwood.com/snes9x2005/log/?h=performance)

[tiopex]

That's the plan to add an option to the ra settings

[Apaczer]

You should merge here only then and if succed try to push it upstream, some ppl may like it. Considering it hasn't got any signiffact updates in years (last from @jSTE0, cheers!).

[jSTE0]

Previously discussed in TriForceX/MiyooCFW#479 in the context of snes9x4d and was known to break some games as noted in TriForceX/MiyooCFW#380.

[Apaczer]

seems to work 👍 ("Batman Returs" brakes at startup), but you need full core restart (close and launch again).
Anyway I'm going offline for a month (✈️ ), so this will be my last request.