omap3: SDRC: add timing data for Numonyx M65KxxxxAM

Add timing data for the Numonyx M65KxxxxAM SDRAM chip, used on the
IGEP v2 board.

Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>