Revert "usb: typec: ucsi: Add support for message out data structure"

Revert "usb: typec: ucsi: Add support for message out data structure"

This reverts commit db0028637cc832add6d87564fcc2ebb12781b046.

The new buffer management code that this feature relies on is broken so
revert for now.

As for the in buffer, nothing prevents the out message size and buffer
from being modified while the message is being processed due to lack of
serialisation.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/20251222152204.2846-4-johan@kernel.org