DSPCore: Make DSPCore_SetException() take an enum type instead of a u8

Makes it more immediately indicative which values are intended to be
passed to this function.

Source/Core/Core/DSP/DSPCore.cpp

@@ -202,9 +202,9 @@ void DSPCore_Reset()
   Analyzer::Analyze();
 }
 
-void DSPCore_SetException(u8 level)
+void DSPCore_SetException(ExceptionType exception)
 {
-  g_dsp.exceptions |= 1 << level;
+  g_dsp.exceptions |= 1 << exception;
 }
 
 // Notify that an external interrupt is pending (used by thread mode)

Source/Core/Core/DSP/DSPCore.h

@@ -208,7 +208,7 @@ enum : u16
 };
 
 // Exception vectors
-enum : int
+enum ExceptionType : int
 {
   EXP_STOVF = 1,  // 0x0002 stack under/over flow
   EXP_2 = 2,      // 0x0004
@@ -356,7 +356,7 @@ void DSPCore_CheckExceptions();
 void DSPCore_SetExternalInterrupt(bool val);
 
 // sets a flag in the pending exception register.
-void DSPCore_SetException(u8 level);
+void DSPCore_SetException(ExceptionType exception);
 
 enum class State
 {