microblaze: move CONFIG_SYS_TEXT_BASE to defconfig

This is how CONFIG options are defined by Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/Kconfig b/Kconfig
index 9b07838..ee4e060 100644
--- a/Kconfig
+++ b/Kconfig
@@ -209,7 +209,7 @@
 
 config SYS_TEXT_BASE
 	depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
-		(M68K && !TARGET_ASTRO_MCF5373L)
+		(M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE
 	depends on !EFI_APP
 	hex "Text Base"
 	help