Namco system 246/256 support

[israpps]

Pull Request checklist

Note: these are not necessarily requirements

• I reformatted the code with clang-format
• I checked to make sure my submission worked
• I am the author of submission or have permission from the original author
• Requires update of the PS2SDK or other dependencies
• Others (please specify below)

TODO:

• fix issue with font text not rendering
• fix detection of almost everything
• fix issue with rom dumping (Arcade ROMDRV Has some special stuff inside?)
• whatever i'm missing (and I know there will be)

[AKuHAK]

@israpps I am heavily rewriting ps2ident, better use this branch as a base: https://github.com/AKuHAK/PS2Ident/tree/new

[AKuHAK]

Fonts are embedded now, also dumping is done thrugh EE memory, so it should be more reliable. Also there were some random memory leaks, maybe some problems were due to that leaks.

[israpps]

Very well.

I was worried at first of differences on ROMDRV. but there seem to be none. will test on the new branch soon

[israpps]

I will leave this as a note here.

Since DVDPLAYER does not exist on COH, make PS2IDENT load rom0:ACDEV. so the alreay existing code dumps the arcade flash chip from the arcade board when possible