Revert "Minor decoder optimizations, kernel fixes, cpu backend fixes"

src/xenia/cpu/ppc/ppc_frontend.cc

@@ -105,11 +105,6 @@ bool PPCFrontend::Initialize() {
 }
 
 bool PPCFrontend::DeclareFunction(GuestFunction* function) {
-
-	//chrispy: make sure we aren't declaring a function that is actually padding data, this will mess up PPCScanner and is hard to debug
-	//wow, this halo reach actually has branches into 0 opcodes, look into further
-  //xenia_assert(*reinterpret_cast<const uint32_t*>(
-  //                 this->memory()->TranslateVirtual(function->address())) != 0);
   // Could scan or something here.
   // Could also check to see if it's a well-known function type and classify
   // for later.