Replace non critical PANIC with DEBUGPANIC to save the code space

arch/misoc/src/lm32/lm32_reprioritizertr.c

@@ -90,7 +90,7 @@ void up_reprioritize_rtr(struct tcb_s *tcb, uint8_t priority)
 #endif
     )
     {
-       PANIC();
+       DEBUGPANIC();
     }
   else
     {

arch/misoc/src/lm32/lm32_sigdeliver.c

@@ -134,7 +134,7 @@ void lm32_sigdeliver(void)
    * interrupts are disabled.
    */
 
-  PANIC();
+  DEBUGPANIC();
 }
 
 #endif /* !CONFIG_DISABLE_SIGNALS */