modifies the kernel version check in the source code to ensure compatibility with kernel versions below 6.1.39.
The change was necessary due to the removal of the REGULATORY_IGNORE_STALE_KICKOFF flag in recent kernel versions, which caused compilation issues.
The modified check now correctly excludes kernel versions 6.1.39 and above, preventing these issues.
Reference: morrownr/88x2bu-20210702#165 (comment)
Signed-off-by: thienandangthanh <thienandangthanh@gmail.com>