The gpt0 timer clock has been wrong since:
  6bbaec56 ARM i.MX25: implement clocks using common clock framework
Signed-off-by: NDenis Carikli <denis@eukrea.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>