wifi: iwlwifi: read BIOS PNVM only for non-Intel SKU

The driver is supposed to read the PNVM from BIOS only for non-Intel
SKUs. For Intel SKUs the OEM ID will be 0.
Read BIOS PNVM only when a non-Intel SKU is indicated.

Fixes: b99e32cb

 ("wifi: iwlwifi: Take loading and setting of pnvm image out of parsing part")
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240131091413.3625cf1223d3.Ieffda5f506713b1c979388dd7a0e1c1a0145cfca@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>