[U-Boot] esdmode for DDR2

Hi,

I was looking the ctrl_regs.c file at the last release of u-boot, specifically at sdram_mode register, and checking at AN3369.pdf I think that Rtt bit position might be wrong. At the code, the bit shifting is 5, but shouldn't be 6? I think that it overwrites AL register.

Thanks in advance,

Werner Nedel.