fwget: add needed firmware for AMD Raphael GPUs

This GPU is found in Ryzen 7000 series CPUs.

For future reference, the list of firmware versions for amdgpu drivers
can be found in [1].

[1] - https://docs.kernel.org/gpu/amdgpu/driver-misc.html

Reviewed by: imp, Christos Longros
Pull Request: https://github.com/freebsd/freebsd-src/pull/1308