xtensa: no need to clear DEPC on C handler exit for MPU

Xtensa MPU code does not handle double exception in C. So there
is no need to clear DEPC on C handler exit.

Signed-off-by: Daniel Leung <[email protected]>

Author: dcpleung

arch/xtensa/core/vector_handlers.c

@@ -370,15 +370,14 @@ void *xtensa_excint1_c(void *esf)
 		_current_cpu->nested = 1;
 	}
 
-#if defined(CONFIG_XTENSA_MMU) || defined(CONFIG_XTENSA_MPU)
 #ifdef CONFIG_USERSPACE
 fixup_out:
 #endif
+#if defined(CONFIG_XTENSA_MMU)
 	if (is_dblexc) {
 		__asm__ volatile("wsr.depc %0" : : "r"(0));
 	}
-#endif /* CONFIG_XTENSA_MMU || CONFIG_XTENSA_MPU */
-
+#endif /* CONFIG_XTENSA_MMU */
 
 	return return_to(interrupted_stack);
 }