wifi: iwlwifi: don't load old firmware for Sc

This is a future product, don't try to load ancient
firmware images for it, they don't exist anyway.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230621130443.a15e7bf936cb.I68c3c71fda62c837e4da885a42471bf772ac1202@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>