DR9574 board default setup for DR9274-5G6G modules :

You can use u-boot to update/recover firmware - recommended is to use serial console as described in users guide

Before You update firnware You need use setenv machid xxxx to set machid - for example run the following command:

setenv machid 8050e01  

And after upgrade :

use the following setting to run dr9274-5g6g module 

  IPQ9574# print
baudrate=115200
bootargs=console=ttyMSM0,115200n8 cnss2.enable_qcn9224_support=1 cnss2.bdf_pci2=0x1006 cnss2.bdf_pci3=0x1003 cnss2.enable_mlo_support=0
bootcmd=aq_load_fw 0x0&&aq_load_fw 0x8&&bootipq
bootdelay=2
eth1addr=c4:4b:d1:60:a:12
eth2addr=c4:4b:d1:60:a:13
eth3addr=c4:4b:d1:60:a:14
eth4addr=c4:4b:d1:60:a:15
eth5addr=c4:4b:d1:60:a:16
ethact=eth0
ethaddr=c4:4b:d1:60:a:11
fdt_high=0x48500000
fdtcontroladdr=4a4f4004
fileaddr=523bf7ec
filesize=7e5000
flash_type=7
ipaddr=192.168.1.1
machid=8051301
mtddevname=rootfs
mtddevnum=0
mtdids=nand0=nand0
mtdparts=mtdparts=nand0:0x3c00000@0xc0000(rootfs)
netmask=255.255.255.0
partition=nand0,0
qcn9224_version=1
serverip=192.168.1.10
soc_version_major=1
soc_version_minor=1
stderr=serial@78B1000
stdin=serial@78B1000
stdout=serial@78B1000

Environment size: 851/65532 bytes

You can rum command "ls pci" to check if this card can be detected