Some Analog devices iio adc linux drivers being identified with license cal-1.0 incorrectly

[matthew-jones-voyg]

HTML output for linux-2017_R1/drivers/iio/adc/ad9361.h indicates license is

cal-1.0

and other files:
ad6676.h
frequency/ad9517.c

In the files themselves they are identified as GPL-2.
Example:
https://github.com/analogdevicesinc/linux/blob/main/drivers/iio/adc/ad9361.h

[Aa-Rho-Hi]

To address this CAL-1.0 false positive, this PR makes the following changes:
• Tightens CAL-1.0 detection by increasing matching strictness (minimum_coverage and minimum_match_length) to avoid matches on short generic phrases like “Licensed under the …”.
• Strengthens detection by relying more on unique CAL identifiers (e.g., SPDX-License-Identifier: CAL-1.0 and the full “Cryptographic Autonomy License” name).
• Adds a regression test using a simple GPL header to ensure files that state “Licensed under the GPL-2.” are not misidentified as CAL in the future.
These changes are based on the false positives observed in Linux kernel files such as drivers/iio/adc/ad9361.h.

added my pr here - https://github.com/aboutcode-org/scancode-toolkit/pull/4741/checks