May I ask, do you happen to get anything on your display?
You should see Windows logo after U-boot hands off to UEFI.
Message KDTARGET: Refreshing KD connection
This message is the Windows kernel debugger is attempting to connect over serial, which indicates you are making it into Windows.
I have a similar issue.
I use i.MX8M Mini EVK with W1860_1_0_1_NXPEVK_iMX8M_Mini_2GB_TestOEMInput-xml-Release.ffu flashed to SD card.
The attach files are screen shots of tera term and HDMI display.
It complains no IP address and stoppped. I don't have ethernet connection. How can I setup WIFI connection?