Update boot LOGO

1. First prepare a boot LOGO picture, the picture must comply with the following conditions.

   [!Note] The picture name is fixed as boot_logo.jpg. Note that the file extension is jpg; other names will not be recognized.
   The image size cannot exceed 128KB.
   The picture resolution must be exactly the same as the screen resolution.

   1. Copy boot_logo.jpg to the root directory of the TF card
   2. Insert the TF card into the machine, and then the device will automatically pop up an update prompt. Select boot_logo and click upgrade.
   3. After the upgrade is complete, the system will shut down and restart. Pull out the TF card at this time. Prevent the system from being upgraded again.

Remarks : Upgrade a completely black picture to remove the boot LOGO.