[nvidia-bluefield] Load MFT drivers from the SONiC rootfs during BFB installation. (sonic-net#21646)

- Why I did it
To ensure the Linux kernel and MFT drivers' signatures are aligned, load the MFT drivers in the BFB installer from the SONiC image root filesystem

- How I did it
Mount SONiC image rootfs and load drives from the rootfs.

- How to verify it
Compile and install BFB image. DPU NIC FW upgrade should finish successfully during the image installation

Author: oleksandrivantsiv

platform/nvidia-bluefield/installer/create_sonic_image

@@ -292,15 +292,8 @@ create_bfb_image() {
         copy_bin $tool
     done
 
-    kernel_mft=$(dpkg -l | grep kernel-mft-dkms-modules | awk '/^ii/ {print $2}')
-    if [[ $kernel_mft == "" ]]; then
-        echo "ERROR: kernel-mft-dkms-modules package is not installed"
-        exit 1
-    fi
-
     for tool in `dpkg -L mft` \
             `dpkg -L mft-oem` \
-            `dpkg -L $kernel_mft` \
             `dpkg -L xmlstarlet | grep -v share`
     do
         if [ -d $tool ]; then

platform/nvidia-bluefield/installer/install.sh.j2

@@ -235,6 +235,17 @@ if [[ $fw_upgrade_is_needed == "true" ]]; then
 	ex mkdir -p $sonic_fs_mountpoint
 	ex mount -t squashfs $sonic_fs_path $sonic_fs_mountpoint
 
+	kernel_mft=$(chroot $sonic_fs_mountpoint dpkg -l | grep kernel-mft-dkms-modules | awk '/^ii/ {print $2}')
+	mft_files=$(chroot $sonic_fs_mountpoint dpkg -L $kernel_mft)
+
+	for f in $mft_files; do
+		if [[ $sonic_fs_mountpoint/$f != *.ko ]]; then
+			continue
+		fi
+
+		insmod "$sonic_fs_mountpoint/$f"
+	done
+
 	ex mkdir -p /etc/mlnx/
 
 	ex ln -s /mnt/$image_dir/platform/fw/asic/fw-BF3.mfa /etc/mlnx/fw-BF3.mfa