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/DSi.cpp

@@ -111,6 +111,8 @@ void DSi::Reset()
     //ARM9.CP15Write(0x100, ARM9.CP15Read(0x100) | 0x00050000);
     NDS::Reset();
 
+    // The SOUNDBIAS register does nothing on DSi
+    SPU.SetApplyBias(false);
     KeyInput &= ~(1 << (16+6));
     MapSharedWRAM(3);
 
@@ -128,7 +130,7 @@ void DSi::Reset()
 
     AES.Reset();
 
-    if (Platform::GetConfigBool(Platform::DSi_FullBIOSBoot))
+    if (FullBIOSBoot)
     {
         SCFG_BIOS = 0x0000;
     }
@@ -679,7 +681,7 @@ void DSi::SoftReset()
 
     AES.Reset();
 
-    if (Platform::GetConfigBool(Platform::DSi_FullBIOSBoot))
+    if (FullBIOSBoot)
     {
         SCFG_BIOS = 0x0000;
     }
@@ -741,7 +743,7 @@ bool DSi::LoadNAND()
     memset(NWRAMMask, 0, sizeof(NWRAMMask));
 
     u32 bootparams[8];
-    if (Platform::GetConfigBool(Platform::DSi_FullBIOSBoot))
+    if (FullBIOSBoot)
     {
         // TODO: figure out default MBK mapping
         // MBK1..5: disable mappings
@@ -879,7 +881,7 @@ bool DSi::LoadNAND()
     Log(LogLevel::Debug, "eMMC CID: %08llX%08llX\n", *(const u64*)&emmccid[0], *(const u64*)&emmccid[8]);
     Log(LogLevel::Debug, "Console ID: %" PRIx64 "\n", image->GetConsoleID());
 
-    if (Platform::GetConfigBool(Platform::DSi_FullBIOSBoot))
+    if (FullBIOSBoot)
     {
         // point CPUs to boot ROM reset vectors
         ARM9.JumpTo(0xFFFF0000);