USB: serial: correct spelling mistakes in comments

Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/usb/serial/aircable.c
Simple merge

diff --cc drivers/usb/serial/ark3116.c
Simple merge

diff --cc drivers/usb/serial/belkin_sa.c
Simple merge

diff --cc drivers/usb/serial/cyberjack.c
Simple merge

diff --cc drivers/usb/serial/garmin_gps.c
Simple merge

diff --cc drivers/usb/serial/iuu_phoenix.c
Simple merge

diff --cc drivers/usb/serial/keyspan.c
Simple merge

diff --cc drivers/usb/serial/keyspan_usa26msg.h
Simple merge

diff --cc drivers/usb/serial/mos7720.c
Simple merge

diff --cc drivers/usb/serial/opticon.c
Simple merge

diff --cc drivers/usb/serial/visor.h
Simple merge

diff --cc drivers/usb/serial/zte_ev.c
Simple merge