devel/p4: Update to r22.2.2407422

Update MASTER_SITES including a backup site hosted by the maintainer.

Remove BROKEN lines (this version is 7 years newer).

While here, adjust the PR patchset to eliminate DIST_SUBDIR and
embed the version string into the downloaded package.

PR: 270387
Approved by: antonfb@hesiod.org (maintainer)