Add support for nocash debug registers on the ARM7

[AntonioND]

No description provided.

[AntonioND]

Fixes #2130 to some degree, but this should be improved to work with other access sizes.

[Arisotura]

sorry for looking at this so late, but

I'm not a big fan of having the wifi IO handlers fall through to the regular IO handlers... maybe we could make this more optimal with a bit of reworking. but maybe I'm just nitpicking.

[AntonioND]

Hmmm without that change the accesses don't reach the right switch statement. I will take a look at it this weekend.

[Arisotura]

I get the technical reason behind it, that's just my "code efficiency/niceness" part talking :P

I think there's a way to make this a bit better... I'm thinking about it

[AntonioND]

BTW, if someone comes up with a better idea, feel free to do it. I don't mind having my name in the commit, I'd just like this to be fixed.

[AntonioND]

@Arisotura have you had time to think about the approach you prefer? I can close this PR if you want to implement it in a different way.