feat(checkpatch.pl): update to v5.14-rc6

The checkpatch script was quite old (from kernel 4.16).
Update to the latest version from kernel v5.14-rc6.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: Ia4e8a456273fb59f0937ac96cf1cc55150d06f29
1 file changed