powerpc/83xx/km: update SDRAM parameters for km8321 boards

Measurements during HW basic test showed, that the SDRAM timing
has to be optimized. This patch adapted these timings accordingly.

Signed-off-by: Marco Schmid <marco.schmid@keymile.com>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
1 file changed