platform/x86: msi-ec: rename fn_super_swap

platform/x86: msi-ec: rename fn_super_swap

This patch renames fn_super_swap to fn_win_swap for consistency
with the downstream version of the driver. Renaming the field to
fn_super_swap in the downstream driver would require modifying several
branches that are yet to be merged into the main branch, so I decided
to do it here instead.

Cc: Aakash Singh <mail@singhaakash.dev>
Cc: Jose Angel Pastrana <japp0005@red.ujaen.es>
Signed-off-by: Nikita Kravets <teackot@gmail.com>
Link: https://lore.kernel.org/r/20231006175352.1753017-7-teackot@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>