x86: Fix misspelled Kconfig symbols

Fix misspelled Kconfig symbols as detected by
scripts/checkkconfigsymbols.py.

 [ bp: Combine into a single patch. ]

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210803113531.30720-7-lukas.bulwahn@gmail.com