configs: Migrate CONFIG_SYS_TEXT_BASE

On the NIOS2 and Xtensa architectures, we do not have
CONFIG_SYS_TEXT_BASE set.  This is a strict migration of the current
values into the defconfig and removing them from the headers.

I did not attempt to add more default values in and for now will leave
that to maintainers.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/apf27_defconfig b/configs/apf27_defconfig
index b9a89ee..e4ec54c 100644
--- a/configs/apf27_defconfig
+++ b/configs/apf27_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 # CONFIG_SPL_USE_ARCH_MEMCPY is not set
 CONFIG_TARGET_APF27=y
+CONFIG_SYS_TEXT_BASE=0xA0000800
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_NAND_SUPPORT=y
 CONFIG_IDENT_STRING=" apf27 patch 3.10"