The slimbus mux put operation unconditionally reports a change in value
which means that spurious events are generated. Fix this by exiting early
in that case.
Signed-off-by: NMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220603124609.4024666-1-broonie@kernel.orgSigned-off-by: NMark Brown <broonie@kernel.org>