Sorry for answering so late, but I don't usually visit this forum very much. I pass you the EFI that I have working everything in catalina. I would like to tell you that I changed the wifi card for a broadcom, so that it would be compatible with MacOS. I think that there is already kext for intel.
I am attaching my EFI with a link, as it does not allow me to upload the whole file.
https://we.tl/t-LEBXZ7bKr1
Any other doubt, you can reach me better in my mail.
jelobe@gmail.com