[ARM] 3624/1: Report true modem control line states

Patch from Uli Luckas

This patch removes the fake return from serial_pxa_get_mctrl.

Signed-off-by: Uli Luckas <u.luckas@road-gmbh.de>
I just can't remember why this return was there.
Being in the first column clearly indicates it was meant to be removed.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>