[Nokia-7215] Fix software upgrade corner case (#20169)

After software upgrade the box fails to boot to the new image due to a
bug in uboot of unable to read fragmented files.
Make sure all files accessed by Uboot are defragmented before rebooting
the device

platform/marvell/platform_armhf.conf

@@ -61,6 +61,15 @@ demo_mnt=/tmp
 FW_ENV_DEFAULT='/dev/mtd0 0x00500000 0x80000 0x100000 8'
 UBOOT_FW_DEFAULT=1
 
+defrag_file() {
+    echo "Defragment file: $1 (used by U-Boot)"
+    e4defrag $1 >/dev/null
+    if [ $? -ne 0 ]; then
+        echo "ERROR: defrag failed for $1"
+        exit 3
+    fi
+}
+
 prepare_boot_menu() {
     echo "Sync up cache ..."
     sync
@@ -100,15 +109,22 @@ prepare_boot_menu() {
         echo $FW_ENV_DEFAULT > /etc/fw_env.config
         echo "Using pre-configured uboot env"
     fi
+
+    image_name=${image_dir}${kernel_fname}
+    initrd_name=${image_dir}${initrd_fname}
+    fdt_name=${image_dir}${fdt_fname}
+
     if [ "$PLATFORM" = "armhf-nokia_ixs7215_52x-r0" ]; then
         FW_ENV_DEFAULT='/dev/mtd0 0x00100000 0x10000 0x10000'
         echo $FW_ENV_DEFAULT > /etc/fw_env.config
         echo "Using pre-configured uboot env for armhf-nokia_ixs7215_52x-r0"
+        if [ "$install_env" != "onie" ]; then
+            defrag_file ${demo_mnt}/${image_name}
+            defrag_file ${demo_mnt}/${initrd_name}
+            defrag_file ${demo_mnt}/${fdt_name}
+        fi
     fi
 
-    image_name=${image_dir}${kernel_fname}
-    initrd_name=${image_dir}${initrd_fname}
-    fdt_name=${image_dir}${fdt_fname}
 
     if [ "$install_env" = "onie" ]; then
         FW_ARG="-f"