libata: Downgrade unsupported feature warnings to notifications

References: https://gitlab.freedesktop.org/drm/intel/-/issues/8032


Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Petri Latvala <petri.latvala@intel.com>
[danvet: Rebase]
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>