Rename CONFIG_SYS_TEXT_BASE to CONFIG_TEXT_BASE

The current name is inconsistent with SPL which uses CONFIG_SPL_TEXT_BASE
and this makes it imposible to use CONFIG_VAL().

Rename it to resolve this problem.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-k3/config_secure.mk b/arch/arm/mach-k3/config_secure.mk
index 6d63c57..9cc1f9e 100644
--- a/arch/arm/mach-k3/config_secure.mk
+++ b/arch/arm/mach-k3/config_secure.mk
@@ -30,7 +30,7 @@
 	$(call if_changed,mkfitimage)
 
 MKIMAGEFLAGS_u-boot.img_HS = -f auto -A $(ARCH) -T firmware -C none -O u-boot \
-	-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
+	-a $(CONFIG_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
 	-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board" -E \
 	$(patsubst %,-b arch/$(ARCH)/dts/%.dtb_HS,$(subst ",,$(CONFIG_OF_LIST)))