kbuild: standalone: simplify clean-files
Files added $(extra-) are removed by "make clean".
Besides, wildcard "*.srec *.bin" is simpler.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/examples/standalone/Makefile b/examples/standalone/Makefile
index 2dacba2..0863a8c 100644
--- a/examples/standalone/Makefile
+++ b/examples/standalone/Makefile
@@ -22,7 +22,7 @@
ELF := $(strip $(extra-y))
extra-y += $(addsuffix .srec,$(extra-y)) $(addsuffix .bin,$(extra-y))
-clean-files := $(extra-) $(addsuffix .srec,$(extra-)) $(addsuffix .bin,$(extra-))
+clean-files := *.srec *.bin
COBJS := $(ELF:=.o)