Revert "serdev: BREAK/FRAME/PARITY/OVERRUN notification prototype V2"

This reverts commit d8e9a406.

It needs some future changes as pointed out by Johan and is not ready to
be merged just yet.

Reported-by: Johan Hovold <johan@kernel.org>
Cc: Magnus Damm <damm+renesas@opensource.se>
Link: https://lore.kernel.org/r/Yc7oZ/1tu95Z4wPS@hovoldconsulting.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>