--- zzzz-none-000/linux-4.9.276/arch/nios2/boot/Makefile	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/arch/nios2/boot/Makefile	2023-04-05 08:19:00.000000000 +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)"