Made changes in fusesoc -system: pipistrello-s6-v1. Now we have sdc_controller, which works well and removed errors with lpddr.
In folder /sw/ is placed a example of sdc_controller's work. In folder linux/drivers/mmc/host we have driver for sdc_controller for linux. And also is changed image of linux (now it's with ocsdc driver module) and pipistrello.dts includes ocsdc also.