riscv: Get the lock first when handling interrupts

Get the lock when handling interrupts.

src/arch/riscv/c_traps.c

@@ -102,7 +102,7 @@ void VISIBLE NORETURN restore_user_context(void)
 
 void VISIBLE NORETURN c_handle_interrupt(void)
 {
-    NODE_LOCK_IRQ;
+    NODE_LOCK_IRQ_IF(getActiveIRQ() != irq_remote_call_ipi);
 
     c_entry_hook();