configs: Re-run migrations

As the CI test for stopping platforms from being merged that were
defining symbols that had Kconfig entries, a small number of symbols
needed to be migrated again.  Do so, and catch two cases the README
should also have been updated but was not.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/verdin-imx8mp_defconfig b/configs/verdin-imx8mp_defconfig
index 4c28f7f..e4e9efd 100644
--- a/configs/verdin-imx8mp_defconfig
+++ b/configs/verdin-imx8mp_defconfig
@@ -25,6 +25,7 @@
 CONFIG_IMX_BOOTAUX=y
 CONFIG_SPL_IMX_ROMAPI_LOADADDR=0x48000000
 CONFIG_DISTRO_DEFAULTS=y
+CONFIG_REMAKE_ELF=y
 CONFIG_SYS_LOAD_ADDR=0x43500000
 CONFIG_FIT=y
 CONFIG_FIT_EXTERNAL_OFFSET=0x3000