Prepare to run checkpatch on patches submitted to gerrit to point out
various linting errors automatically, such as { after functions not
placed on a new line, or common spelling errors.
Import version from 7e6cdd7f ("checkpatch: improve ALLOC_ARRAY_ARGS test")
of linux.git.
Related: OS#5087
Related: https://osmocom.org/projects/cellular-infrastructure/wiki/Linting
Change-Id: I58571a0409e79d88d37e8328f41a540a58cfb198
