kernel/mxs: create files for v6.18 (from v6.12)

This is an automatically generated commit.

When doing `git bisect`, consider `git bisect --skip`.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

diff --git a/target/linux/mxs/config-6.12 b/target/linux/mxs/config-6.18
similarity index 100%
rename from target/linux/mxs/config-6.12
rename to target/linux/mxs/config-6.18