Feature request: EFI_DHCP4_PROTOCOL

[ChocolateLoverRaj]

I'm not sure if I need this but I think I do for my use case, which is:

• Download files
• Save them to disk
• Chain-boot the downloaded .efi file

I think the uefi crate would also need TCP to work (and I would need to use a Rust library that builds off of TCP to make HTTP requests cuz I'm pretty sure my computer has TCP but not HTTP UEFI functionality).

[phip1611]

Hey! Regarding a TCP stack, there is this (probably 90 percent done) effort.

#1130

Feel free to continue the work and submit a PR.