[U-Boot] [PATCH] i.MX28: Fix ref_cpu clock setup

[Robert Deliën]

> Robert, I tested first three patches on my board and it refuses to boot. Why?

The problem is in here:
io_reg = MXC_IOCLK1 - io; /* Register order is reversed */

I will rework and resubmit the patches 'soon'. I'm a bit numb of reworking and resubmitting and I just received a board to bringup last week, and that's got my priority.

BTW: It seems that mx28evk DDR2 is overclocked a bit. For example tRCD is set to 3, where it should be. I didn't look into all the other settings yet, because lowering the clock helps for my board, for now.