dt-bindings: serial: 8250: deprecate aspeed, sirq-polarity-sense

dt-bindings: serial: 8250: deprecate aspeed, sirq-polarity-sense

This property ties SIRQ polarity to SCU register bits that don't
necessarily have any direct relationship to it; the only use of it was
removed in commit c82bf6e133d3 ("ARM: aspeed: g5: Do not set sirq
polarity").

Reviewed-by: Joel Stanley <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Zev Weiss <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>