core: procd: Fix license-checksum error
core: procd: Fix license-checksum error

Some license files have been renamed, in the hardknott-branch,
to match current SPDX naming conventions.

See https://docs.yoctoproject.org/migration-guides/migration-3.3.html
"Single version common license file naming" for further information.

This fix edits the procd-inittab.bb to use GPL-2.0-only
instead of GPL-2.0 as license file.

kraj/meta-openwrt