Makefile: fix posix support on find

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Makefile

@@ -3112,9 +3112,9 @@ clobber:	clean
 	@rm -f $(obj)tools/{fdt_wip.c,libfdt_internal.h}
 	@rm -f $(obj)cpu/mpc824x/bedbug_603e.c
 	@rm -f $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm
-	@[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -lname "*" -print | xargs rm -f
-	@[ ! -d $(obj)onenand_ipl ] || find $(obj)onenand_ipl -lname "*" -print | xargs rm -f
-	@[ ! -d $(obj)api_examples ] || find $(obj)api_examples -lname "*" -print | xargs rm -f
+	@[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -name "*" -type l -print | xargs rm -f
+	@[ ! -d $(obj)onenand_ipl ] || find $(obj)onenand_ipl -name "*" -type l -print | xargs rm -f
+	@[ ! -d $(obj)api_examples ] || find $(obj)api_examples -name "*" -type l -print | xargs rm -f
 
 ifeq ($(OBJTREE),$(SRCTREE))
 mrproper \