Tablify and fix MBC3 inconsistencies.

[elp2]

Does it make sense to list A000-BFFF as a RW Register and Memory range? I think it makes sense to just remove A000-BFFF from the registers section since the description just copies what is above.

[ISSOtm]

Paging @Rangi42, I think the Pokémon hackers can confirm whether MBC3 (not MBC30!) can have 8 SRAM banks?

[Rangi42]

MBC3 = 4 SRAM banks and 128 ROM banks; MBC30 = 8 SRAM banks and 256 ROM banks (although JP Pokémon Crystal only used 8 SRAM banks and 128 ROM banks).

[ISSOtm]

The maximum number of RAM banks needs to be explained somehow... but that also involves talking about MBC3 versus MBC30. Is that variant already mentioned somewhere?

[elp2]

How would you like me to mention? I would assume that since we can address the 8 banks of RAM as mentioned 00-07 this is already covered that that max is 8 for the MBC3x series? Can add a line to that extent if you want.

[avivace]

Alright, I'm going to start merging what we have. Feel free to bring this up again in an issue @ISSOtm .

@elp2 thanks for the contribution!