script: dtc: clean generated files
Fix "make distclean" to clean up generated dtc files.
Without this patch the following files are left around:
- dtc-lexer.lex.c
- dtc-parser.tab.c
- dtc-parser.tab.h
Signed-off-by: Magnus Damm <damm@opensource.se>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index 6d1c6bb..2a48022 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -27,3 +27,5 @@
# dependencies on generated files need to be listed explicitly
$(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
+# generated files need to be cleaned explicitly
+clean-files := dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h