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/configs/tinker-s-rk3288_defconfig b/configs/tinker-s-rk3288_defconfig
index 4ea36be..39b6914 100644
--- a/configs/tinker-s-rk3288_defconfig
+++ b/configs/tinker-s-rk3288_defconfig
@@ -3,7 +3,7 @@
 CONFIG_TPL_SKIP_LOWLEVEL_INIT_ONLY=y
 CONFIG_SYS_ARCH_TIMER=y
 CONFIG_ARCH_ROCKCHIP=y
-CONFIG_SYS_TEXT_BASE=0x01000000
+CONFIG_TEXT_BASE=0x01000000
 CONFIG_SYS_MALLOC_F_LEN=0x4000
 CONFIG_SPL_GPIO=y
 CONFIG_NR_DRAM_BANKS=1