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/total_compute_defconfig b/configs/total_compute_defconfig
index fd16e6e..f9901a4 100644
--- a/configs/total_compute_defconfig
+++ b/configs/total_compute_defconfig
@@ -1,6 +1,6 @@
 CONFIG_ARM=y
 CONFIG_TARGET_TOTAL_COMPUTE=y
-CONFIG_SYS_TEXT_BASE=0xe0000000
+CONFIG_TEXT_BASE=0xe0000000
 CONFIG_SYS_MALLOC_LEN=0x3200000
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_ENV_SIZE=0x2a00000