x86: Kconfig: Remove deprecated CONFIG_SYS_EXTRA_OPTIONS

Currently all x86 boards still use CONFIG_SYS_EXTRA_OPTIONS to define
the text base address. Since it is deprecated, just remove it and use
CONFIG_SYS_TEXT_BASE directly.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/Kconfig b/Kconfig
index 41d4784..85faff7 100644
--- a/Kconfig
+++ b/Kconfig
@@ -178,7 +178,7 @@
 	  new boards should not use this option.
 
 config SYS_TEXT_BASE
-	depends on SPARC || ARC
+	depends on SPARC || ARC || X86
 	hex "Text Base"
 	help
 	  TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture