Yes of course.
I am going with the i.MX_6Dual6Quad_SABRE-SD_Linux_User's_Guide.pdf .
But I solved the problem like this;
I boot the system from SD card and when ı see 'Uncomperresing kernel' and 'loading kernel' in PUTTY, ı take out the SD card and system continue booting on eMMC.
I think U-boot is problem.