--- zzzz-none-000/linux-4.9.218/arch/nios2/boot/Makefile	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ac-750/linux-4.9.218/arch/nios2/boot/Makefile	2022-11-30 09:46:19.000000000 +0000
@@ -53,7 +53,5 @@
 
 $(obj)/dtbs: $(addprefix $(obj)/, $(dtb-y))
 
-clean-files := *.dtb
-
 install:
 	sh $(srctree)/$(src)/install.sh $(KERNELRELEASE) $(BOOTIMAGE) System.map "$(INSTALL_PATH)"