Documentation/features: Update feature lists for 6.17-rc7

It seems that ./Documentation/features/scripts/features-refresh.sh was most
recently used in December 2022, with the latest kernel release v6.1-rc7 at
that time (see commit 7f2e60ff ("Documentation/features: Update feature
lists for 6.1") to update the feature lists in this subdirectory. All
further changes to Documentation/features/ since then have probably been
done manually, without checking for changes in other architectures and
features, that missed to update this part of the documentation.

Running ./Documentation/features/scripts/features-refresh.sh now showed
seven changes of supported features in various architectures (one in arc,
two in parisc, one in riscv, one in openrisc, and two in um), which were
not reflected yet in the current documentation.

To confirm the sanity of this script's suggested changes, I checked if the
commit messages confirm that the features have in fact been added in the
following commits:

  - commit f122668d ("ARC: Add eBPF JIT support")
  - commit 4800a621 ("parisc: Wire up eBPF JIT compiler")
  - commit a869b8c2 ("riscv: enable mseal sysmap for RV64")
  - commit 2f681ba4 ("um: move thread info into task")
  - commit 3f17fed2 ("um: switch to regset API and depend on XSTATE")
  - commit 7ce8716e ("openrisc: Add HAVE_REGS_AND_STACK_ACCESS_API support")
  - commit b5ff52be ("parisc: Convert to generic clockevents")

So, update all documents to the current state with features-refresh.sh.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250925073634.112142-1-lukas.bulwahn@redhat.com>