target-sh4: fix index of address read error exception

Exception index of address read error should be 0x0e0.
Signed-off-by: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

target-sh4/helper.c

@@ -479,7 +479,7 @@ int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
 	    break;
 	case MMU_IADDR_ERROR:
 	case MMU_DADDR_ERROR_READ:
-	    env->exception_index = 0x0c0;
+	    env->exception_index = 0x0e0;
 	    break;
 	case MMU_DADDR_ERROR_WRITE:
 	    env->exception_index = 0x100;