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/xilinx_zynqmp_mini_defconfig b/configs/xilinx_zynqmp_mini_defconfig
index 1474434..245b6a4 100644
--- a/configs/xilinx_zynqmp_mini_defconfig
+++ b/configs/xilinx_zynqmp_mini_defconfig
@@ -2,7 +2,7 @@
 CONFIG_SYS_CONFIG_NAME="xilinx_zynqmp_mini_qspi"
 CONFIG_SYS_ICACHE_OFF=y
 CONFIG_ARCH_ZYNQMP=y
-CONFIG_SYS_TEXT_BASE=0xFFFC0000
+CONFIG_TEXT_BASE=0xFFFC0000
 CONFIG_SYS_MALLOC_LEN=0x1a00
 CONFIG_ENV_SIZE=0x80
 CONFIG_DEFAULT_DEVICE_TREE="zynqmp-mini"