Protectli Dasharo on VP4620 - building manual

To build Dasharo firmware image, follow the steps below:

1. Clone the coreboot repository:

   $ git clone https://github.com/Dasharo/coreboot.git -b protectli_vault_cml/release
   

2. Start build process (note it requires certain blobs to proceed):

   $ cd coreboot
   # you will need to put the ZIP with blobs at this point
   $ ./build.sh vp4620