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/ls1046aqds_nand_defconfig b/configs/ls1046aqds_nand_defconfig
index 753e7b5..b17742b 100644
--- a/configs/ls1046aqds_nand_defconfig
+++ b/configs/ls1046aqds_nand_defconfig
@@ -1,7 +1,7 @@
 CONFIG_ARM=y
 CONFIG_COUNTER_FREQUENCY=25000000
 CONFIG_TARGET_LS1046AQDS=y
-CONFIG_SYS_TEXT_BASE=0x82000000
+CONFIG_TEXT_BASE=0x82000000
 CONFIG_SYS_MALLOC_LEN=0x102000
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y