tools: Remove unecessary symlinking of zlib.h

crc32.c uses the zlib.h header in include/u-boot/zlib.h.  The symlink
was previously necessary to give U-Boot's version of zlib.h precedence
over the host computer's version of zlib.h.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

Makefile

@@ -3532,7 +3532,7 @@ clobber:	clean
 		$(obj)cscope.* $(obj)*.*~
 	@rm -f $(obj)u-boot $(obj)u-boot.map $(obj)u-boot.hex $(ALL)
 	@rm -f $(obj)tools/{crc32.c,env_embedded.c,env/crc32.c,md5.c,sha1.c,inca-swap-bytes}
-	@rm -f $(obj)tools/{image.c,fdt.c,fdt_ro.c,fdt_rw.c,fdt_strerror.c,zlib.h}
+	@rm -f $(obj)tools/{image.c,fdt.c,fdt_ro.c,fdt_rw.c,fdt_strerror.c}
 	@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

tools/.gitignore

@@ -18,4 +18,3 @@
 /fdt_strerror.c
 /fdt_wip.c
 /libfdt_internal.h
-/zlib.h

tools/Makefile

@@ -258,11 +258,7 @@ $(obj)env_embedded.c:
 $(obj)env_embedded.o:	$(obj)env_embedded.c
 	$(CC) -g $(HOST_ENVIRO_CFLAGS) $(CPPFLAGS) -c -o $@ $<
 
-$(obj)zlib.h:
-	@rm -f $@
-	ln -s $(src)../include/zlib.h $@
-
-$(obj)crc32.c: $(obj)zlib.h
+$(obj)crc32.c: $(SRCTREE)/include/u-boot/zlib.h
 	@rm -f $(obj)crc32.c
 	ln -s $(src)../lib_generic/crc32.c $(obj)crc32.c