A bug in the CRTSCT handling caused RTS to alternate between
CRTSCTS=0 => "RTS transmits active signal" and[...]
CRTSCTS=1 => "RTS receives flow control"
instead of
CRTSCTS=0 => "RTS is statically active" and
CRTSCTS=1 => "RTS receives flow control"
Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@xxxxxxxxx>