.bkm importer is missing systems

[YoshiRulz]

At least GG is missing.

When an entry is missing (mnemonic conversion needs to be implemented too), the .bk2 input log is generated with "Null Controller" and will be blank.

BizHawk/src/BizHawk.Client.Common/movie/import/bkm/BkmControllerAdapter.cs

Lines 17 to 36 in 44322e6

	var name = systemId switch
	{
	"Lynx" => "Lynx Controller",
	"SNES" => "SNES Controller",
	"C64" => "Commodore 64 Controller",
	"GBA" => "GBA Controller",
	"A78" => "Atari 7800 ProLine Joystick Controller",
	"DGB" => "Dual Gameboy Controller",
	"WSWAN" => "WonderSwan Controller",
	"N64" => "Nintendo 64 Controller",
	"SAT" => "Saturn Controller",
	"GEN" => "GPGX Genesis Controller",
	"NES" => "NES Controller",
	"GB" => "Gameboy Controller",
	"A26" => "Atari 2600 Basic Controller",
	"TI83" => "TI83 Controller",
	"Coleco" => "ColecoVision Basic Controller",
	"SMS Controller" => "SMS",
	_ => "Null Controller",
	};