serial: fix termios settings in open

serial: fix termios settings in open

Move termios initialization in open into uart_dtr_rts to make sure
it always gets called when necessary. Based on a suggestion from
Alan Cox.

Alan writes:
Ok this sort of makes sense. Something isn't getting initialised and both
getty and minicom will do a termios set which is sorting it out.
This is occurring because the generic block_til_ready sets
ASYNCB_NORMAL_ACTIVE so the termios updating gets skipped.

This patch should cure it and then we can think about doing it more
elegantly by getting the serial layer to use tty_port_open, kfifo and
the like and removing the tons of repeated crap in all the drivers.

Signed-off-by: Arnd Bergmann <[email protected]>
Reported-by: Tony Luck <[email protected]>
Cc: Alan Cox <[email protected]>
Cc: Tony Luck <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>