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/ls1043aqds_tfa_SECURE_BOOT_defconfig b/configs/ls1043aqds_tfa_SECURE_BOOT_defconfig
index 2e581e4..b75c752 100644
--- a/configs/ls1043aqds_tfa_SECURE_BOOT_defconfig
+++ b/configs/ls1043aqds_tfa_SECURE_BOOT_defconfig
@@ -2,7 +2,7 @@
 CONFIG_COUNTER_FREQUENCY=25000000
 CONFIG_TARGET_LS1043AQDS=y
 CONFIG_TFABOOT=y
-CONFIG_SYS_TEXT_BASE=0x82000000
+CONFIG_TEXT_BASE=0x82000000
 CONFIG_SYS_MALLOC_LEN=0x102000
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_ENV_SIZE=0x2000