Nitrogen8MM SOM can't be flashed with current version

[chprat]

Hi,
today I wanted to flash a custom U-Boot version to my Nitrogen8MM SOM (using a Boundary Devices carrier board). However it didn't work in the current version (25d6c0d) although it was possible ~2 months ago (with revision f009770).

Here's what I did:
$ sudo ./imx_usb ../u-boot-imx6/flash.bin
$ sudo ./imx_usb

config file <.//imx_usb.conf>
vid=0x066f pid=0x3780 file_name=mx23_usb_work.conf
vid=0x15a2 pid=0x004f file_name=mx28_usb_work.conf
vid=0x15a2 pid=0x0052 file_name=mx50_usb_work.conf
vid=0x15a2 pid=0x0054 file_name=mx6_usb_work.conf
vid=0x15a2 pid=0x0061 file_name=mx6_usb_work.conf
vid=0x15a2 pid=0x0063 file_name=mx6_usb_work.conf
vid=0x15a2 pid=0x0071 file_name=mx6_usb_work.conf
vid=0x15a2 pid=0x007d file_name=mx6_usb_work.conf
vid=0x15a2 pid=0x0080 file_name=mx6ull_usb_work.conf
vid=0x1fc9 pid=0x0128 file_name=mx6_usb_work.conf
vid=0x15a2 pid=0x0076 file_name=mx7_usb_work.conf
vid=0x1fc9 pid=0x0126 file_name=mx7ulp_usb_work.conf
vid=0x15a2 pid=0x0041 file_name=mx51_usb_work.conf
vid=0x15a2 pid=0x004e file_name=mx53_usb_work.conf
vid=0x15a2 pid=0x006a file_name=vybrid_usb_work.conf
vid=0x066f pid=0x37ff file_name=linux_gadget.conf
vid=0x1b67 pid=0x4fff file_name=mx6_usb_sdp_spl.conf
vid=0x0525 pid=0xb4a4 file_name=mx6_usb_sdp_spl.conf
vid=0x1fc9 pid=0x012b file_name=mx8mq_usb_work.conf
vid=0x1fc9 pid=0x0134 file_name=mx8mm_usb_work.conf
vid=0x1fc9 pid=0x013e file_name=mx8mn_usb_work.conf
vid=0x3016 pid=0x1001 file_name=mx8m_usb_sdp_spl.conf
no matching USB device found

That's how my SOM enumerates when plugged in in flash mode:

usb 1-1: USB disconnect, device number 49
usb 1-1: new high-speed USB device number 50 using xhci_hcd
usb 1-1: New USB device found, idVendor=3016, idProduct=1000, bcdDevice= 2.21
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1: Product: USB download gadget
usb 1-1: Manufacturer: Boundary
hid-generic 0003:3016:1000.0052: hiddev0,hidraw0: USB HID v1.10 Device [Boundary USB download gadget] on usb-0000:00:14.0-1/input0

After going back to revision f009770 flashing succeeded.