x86: fix geode image builds redux

x86: fix geode image builds redux

This patch adds more disabled DRM config symbols from the
x86' config to the generic target configs. The existing
symbols in the x86' configs are kept for now, until we
know whenever we want to remove such symbols or not
(see Github PR #1831, #1825, #1828).

THis patch also contains a squashed patch from
Daniel Engberg <daniel.engberg.lists@pyret.net> titled
"kernel: Fix config for 4.14" which fixes a duplicated line
added by: commit 8bdc241d01eb ("x86: fix geode image builds")

Fixes: 8bdc241d01eb ("x86: fix geode image builds")
Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>