x86: Refresh subtargets kernel config

x86: Refresh subtargets kernel config

This was done by simply running `make kernel_menuconfig CONFIG_TARGET=subtarget`
and then saving without changing any option.

Most of the removed options can be explained because they are already
present in the target config or in the generic 4.9 config:

- PAE-related options, enabled by default on x86 by 961c0eac
- LZO-related options, enabled by default since 4.9

As far as I understand the build system, this shouldn't have any
user-visible impact, because the build system already merges the
various kernel configs during build.

Signed-off-by: Baptiste Jonglez <git@bitsofnetworks.org>