config_whitelist: remove false-positive CONFIG options

U-Boot pulled in several core makefiles from Linux.  The following
are not used in U-Boot:

  - CONFIG_DEBUG_SECTION_MISMATCH
  - CONFIG_FTRACE_MCOUNT_RECORD
  - CONFIG_GCOV_KERNEL
  - CONFIG_GCOV_PROFILE_ALL
  - CONFIG_KASAN
  - CONFIG_MODVERSIONS

We can remove the unused code if we like. (although it will get the
scripts out of sync)

CONFIG_BOOM and CONFIG_HIS_DRIVER are just mentioned in the comment
block of scripts/basic/fixdep.c

CONFIG_SHELL is not configuration, but a variable for internal-use.
It is just a historical misnomer in Kbuild.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>