added option to set CPSR register to arm_interface

src/core/arm/arm_interface.h

@@ -55,6 +55,12 @@ public:
      */
     virtual u32 GetCPSR() const = 0;  
 
+    /**
+     * Set the current CPSR register
+     * @param cpsr Value to set CPSR to
+     */
+    virtual void SetCPSR(u32 cpsr) = 0;
+
     /**
      * Returns the number of clock ticks since the last rese
      * @return Returns number of clock ticks