Remove the last ConfigEntry state (#1902)

* Get rid of `ConfigEntry::ExternalBIOSEnable`

- Now the BIOS files themselves are checked
- The frontend's `Config::ExternalBIOSEnable` is not affected

* Add `JITArgs`

* Pass the JIT status to the `ARM` constructors

* Encapsulate `NDS::EnableJIT`

* Pass `JITArgs` to `ARMJIT`'s constructor

* Remove the `JIT_*` `ConfigEntry`s in favor of members

- Allow all the JIT args to be set with `NDS::SetJITArgs`
- Encapsulate the JIT-related parameters in `ARMJIT` so they can reset the block cache if changed
- Update the active (or newly-created) console in the frontend with adjusted JIT args

* Make audio bit depth and interpolation configurable in `NDSArgs`

- Define enums for both
- Give those settings default values in `NDSArgs`
- Remove `ConfigEntry::AudioBitDepth`
- Initialize these settings in the relevant SPU constructors

* Move the last DSi-specific logic in `Reset` to its own subclass

* Remove `ConfigEntry::DSi_FullBIOSBoot`

- Add members to `DSi` instead for getting and setting this
- Update the frontend to accommodate these changes

* Oops, missed a spot

* Remove `ConfigEntry::Firm_MAC` and `Platform::GetConfigArray`

- Also move the MAC parsing code to `ROMManager`

* Remove the last `ConfigEntry` state

- Make GDB support configurable via members

* Add some `#ifdef`s that I'd almost forgotten

src/Platform.h

@@ -92,39 +92,6 @@ int InstanceID();
  */
 std::string InstanceFileSuffix();
 
-// configuration values
-
-enum ConfigEntry
-{
-#ifdef JIT_ENABLED
-    JIT_Enable,
-    JIT_MaxBlockSize,
-    JIT_LiteralOptimizations,
-    JIT_BranchOptimizations,
-    JIT_FastMemory,
-#endif
-
-    ExternalBIOSEnable,
-
-    Firm_MAC,
-
-    AudioBitDepth,
-
-    DSi_FullBIOSBoot,
-
-#ifdef GDBSTUB_ENABLED
-    GdbEnabled,
-    GdbPortARM7,
-    GdbPortARM9,
-    GdbARM7BreakOnStartup,
-    GdbARM9BreakOnStartup,
-#endif
-};
-
-int GetConfigInt(ConfigEntry entry);
-bool GetConfigBool(ConfigEntry entry);
-bool GetConfigArray(ConfigEntry entry, void* data);
-
 /**
  * Denotes how a file will be opened and accessed.
  * Flags may or may not correspond to the operating system's file API.