wifi: iwlwifi: read WPFC also from UEFI

We are currently reading it only from ACPI, but we need to read it from
UEFI too (if exists, and if the UEFI variables are locked)

Add the reading from the UEFI and use IWL_BIOS_TABLE_LOADER to generate
the code that determines the source from which the table should be read
(ACPI/UEFI).

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250430151952.839a5e7dd89b.I491acbf68047874df97b3971f1ba692ebc998a52@changeid