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/P2041RDB_SPIFLASH_defconfig b/configs/P2041RDB_SPIFLASH_defconfig
index da963b3..72d40c8 100644
--- a/configs/P2041RDB_SPIFLASH_defconfig
+++ b/configs/P2041RDB_SPIFLASH_defconfig
@@ -1,11 +1,12 @@
 CONFIG_PPC=y
+CONFIG_SYS_TEXT_BASE=0xFFF40000
 CONFIG_MPC85xx=y
 CONFIG_TARGET_P2041RDB=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="RAMBOOT_PBL,SPIFLASH,SYS_TEXT_BASE=0xFFF40000"
+CONFIG_SYS_EXTRA_OPTIONS="RAMBOOT_PBL,SPIFLASH"
 CONFIG_BOOTDELAY=10
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y