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/board/google/chromebook_coral/Kconfig b/board/google/chromebook_coral/Kconfig
index 53c651c..ff656fb 100644
--- a/board/google/chromebook_coral/Kconfig
+++ b/board/google/chromebook_coral/Kconfig
@@ -12,7 +12,7 @@
 config SYS_CONFIG_NAME
 	default "chromebook_coral"
 
-config SYS_TEXT_BASE
+config TEXT_BASE
 	default 0xffe00000
 
 config BOARD_SPECIFIC_OPTIONS # dummy
diff --git a/board/google/chromebook_link/Kconfig b/board/google/chromebook_link/Kconfig
index dd29ddf..a6c244f 100644
--- a/board/google/chromebook_link/Kconfig
+++ b/board/google/chromebook_link/Kconfig
@@ -12,7 +12,7 @@
 config SYS_CONFIG_NAME
 	default "chromebook_link"
 
-config SYS_TEXT_BASE
+config TEXT_BASE
 	default 0xfff00000 if !SUPPORT_SPL
 	default 0x10000000 if SUPPORT_SPL
 
diff --git a/board/google/chromebook_samus/Kconfig b/board/google/chromebook_samus/Kconfig
index 9f66d79..011968a 100644
--- a/board/google/chromebook_samus/Kconfig
+++ b/board/google/chromebook_samus/Kconfig
@@ -13,7 +13,7 @@
 	default "chromebook_samus" if TARGET_CHROMEBOOK_SAMUS
 	default "chromebook_samus" if TARGET_CHROMEBOOK_SAMUS_TPL
 
-config SYS_TEXT_BASE
+config TEXT_BASE
 	default 0xffe00000
 
 config BOARD_SPECIFIC_OPTIONS # dummy
diff --git a/board/google/chromebox_panther/Kconfig b/board/google/chromebox_panther/Kconfig
index 875df9d..423a9a2 100644
--- a/board/google/chromebox_panther/Kconfig
+++ b/board/google/chromebox_panther/Kconfig
@@ -12,7 +12,7 @@
 config SYS_CONFIG_NAME
 	default "chromebox_panther"
 
-config SYS_TEXT_BASE
+config TEXT_BASE
 	default 0xfff00000
 
 # Panther actually uses haswell, not ivybridge, so this is just a placeholder