add return value for kmap_large

kernel/paging.c

@@ -69,6 +69,7 @@ int32_t kmap_large(uint32_t v_addr, uint32_t p_addr)
 	PDIR_SET_ADDR(dir_index, p_addr);
 
 	FLUSH_TLB();
+	return 0;
 }
 
 int32_t map_large(uint32_t v_addr, uint32_t p_addr)