Updated timings for new MT41J256M16HA15EIT RAM. Timings are backward compatible to the MT41J256M8HX15E RAMs Signed-off-by: Teresa Gámez <t.gamez@phytec.de> Signed-off-by: Wadim Egorov <w.egorov@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>