serial: imx: reformat and cleanup copyright header

Fix indention, remove old address of the FSF, remove in-file changelog,
mention Freescale.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed