Advanced C64 Compatibility Settings

[sy2002]

• Create a "Advanced Compatibilty Settings" submenu
• Move "CIA: Use 8521 (C64C)" to it
• Add settings for the VIC-II as tagged with @TODO sy2002 in fpga_sid_iec.vhd, particularly 656x/NMOS, 856x/HMOS, early 856x/old HMOS (MiSTer C64 - timing(?) problem in The Space is Broken demo MiSTer-devel/C64_MiSTer#160 (comment))
• Sift through MiSTer's advanced config settings and offer settings if applicable
• Find out if MiST is doing something with the mode6572 and mode6567old setting of the VIC-II
• SID?
• CIA?
• PLA?
• Cassette port: disconnected by default? cassette emulation? real time clock? (see also C64 Emulator Test Suite V2.15 fails on TRAP16 test and HANGS on TRAP17 test with V5.1RC2 / V5.1RC1 #133)
• <other advanced settings?>