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/bcm28155_w1d_defconfig b/configs/bcm28155_w1d_defconfig
index 0593fb0..33199b0 100644
--- a/configs/bcm28155_w1d_defconfig
+++ b/configs/bcm28155_w1d_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK=y
 CONFIG_TARGET_BCM28155_AP=y
+CONFIG_SYS_TEXT_BASE=0xae000000
 CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_CPUINFO is not set
 # CONFIG_DISPLAY_BOARDINFO is not set