tools: Remove CONFIG_SYS_TEXT_BASE in Makefile

This define is not used in tools sources and can be removed
to avoid unnecessary link between tools and defconfig

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

tools/Makefile

@@ -246,7 +246,6 @@ HOST_EXTRACFLAGS += -include $(srctree)/include/libfdt_env.h \
 		$(patsubst -I%,-idirafter%, $(filter -I%, $(UBOOTINCLUDE))) \
 		-I$(srctree)/lib/libfdt \
 		-I$(srctree)/tools \
-		-DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) \
 		-DUSE_HOSTCC \
 		-D__KERNEL_STRICT_NAMES \
 		-D_GNU_SOURCE