IMX6 reference designs really use the DDR3L from Micron, so one can try standard DCD (for DDR3).
" We are putting the Micron MT41K128M16JT part on the SABRE Smart Device board
and the Micron MT41K256M16JT part on the SABRE AI board. We were basically
forced to do that because Micron went EOL on their 1.5V part.
The interesting news is that, while we are still using 1.5V rails for the new
part, the customer can easily change the voltage rail to 1.35V at boot time,
before the DDR3 is loaded."