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/omap35_logic_defconfig b/configs/omap35_logic_defconfig
index 945d7b6..e350e22 100644
--- a/configs/omap35_logic_defconfig
+++ b/configs/omap35_logic_defconfig
@@ -2,7 +2,7 @@
 # CONFIG_SPL_USE_ARCH_MEMCPY is not set
 # CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_OMAP2PLUS=y
-CONFIG_SYS_TEXT_BASE=0x80100000
+CONFIG_TEXT_BASE=0x80100000
 CONFIG_SYS_MALLOC_F_LEN=0x3000
 CONFIG_TI_COMMON_CMD_OPTIONS=y
 # CONFIG_SPL_GPIO is not set