atmel_serial: fix RTS high after initialization in RS485 mode

When working in RS485 mode, the atmel_serial driver keeps RTS high after
the initialization of the serial port.  It goes low only after the first
character has been sent.

[[email protected]: simplify code]
Signed-off-by: Claudio Scordino <[email protected]>
Signed-off-by: Arkadiusz Bubala <[email protected]>
Tested-by: Arkadiusz Bubala <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
1 file changed