platform/x86: msi-laptop: Add msi_scm_disable_hw_fn_handling() helper

Add a msi_scm_disable_hw_fn_handling() to remove the duplicate code
for this in the resume and init paths.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220826111453.178962-2-hdegoede@redhat.com