sparc: clean boot/

Leave all cleaning to boot/Makefile
and delete zImage too when we do a 'make clean'

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/boot/Makefile

@@ -7,7 +7,8 @@ ROOT_IMG	:= /usr/src/root.img
 ELFTOAOUT	:= elftoaout
 
 hostprogs-y	:= piggyback btfixupprep
-targets		:= tftpboot.img btfix.o btfix.S image
+targets		:= tftpboot.img btfix.o btfix.S image zImage
+clean-files	:= System.map
 
 quiet_cmd_elftoaout	= ELFTOAOUT $@
       cmd_elftoaout	= $(ELFTOAOUT) $(obj)/image -o $@