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/peach-pit_defconfig b/configs/peach-pit_defconfig
index 8b40caf..c0f5a01 100644
--- a/configs/peach-pit_defconfig
+++ b/configs/peach-pit_defconfig
@@ -3,7 +3,7 @@
 CONFIG_SPL_SKIP_LOWLEVEL_INIT=y
 CONFIG_ARCH_CPU_INIT=y
 CONFIG_ARCH_EXYNOS=y
-CONFIG_SYS_TEXT_BASE=0x23E00000
+CONFIG_TEXT_BASE=0x23E00000
 CONFIG_SYS_MALLOC_LEN=0x5004000
 CONFIG_SYS_MALLOC_F_LEN=0x400
 CONFIG_ARCH_EXYNOS5=y