Merge branch '2021-12-01-Kconfig-migrations' into next

- Finish converting CONFIG_USE_BOOTCOMMAND, CONFIG_BOOTCOMMAND,
  CONFIG_RAMBOOTCOMMAND, CONFIG_NFSBOOTCOMMAND, all of
  CONFIG_SYS_[BO]R[0-7]_PRELIM, CONFIG_FSL_DDR_BIST and
  CONFIG_FSL_DDR_INTERACTIVE.
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 1e1ef76..50dd3f9 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -858,7 +858,6 @@
 CONFIG_NET_MULTI
 CONFIG_NET_RETRY_COUNT
 CONFIG_NEVER_ASSERT_ODT_TO_CPU
-CONFIG_NFSBOOTCOMMAND
 CONFIG_NFS_TIMEOUT
 CONFIG_NOBQFMAN
 CONFIG_NON_SECURE
@@ -981,7 +980,6 @@
 CONFIG_QIXIS_I2C_ACCESS
 CONFIG_QSPI
 CONFIG_QUOTA
-CONFIG_RAMBOOTCOMMAND
 CONFIG_RAMBOOT_NAND
 CONFIG_RAMBOOT_SPIFLASH
 CONFIG_RAMBOOT_TEXT_BASE