Added board target/config and script for downloading blobs for Nvidia K2100m dGPU

[TrustExecutor]

new file: blobs/w541/vbios_w541_k2100m.sh
new file: boards/UNTESTED-w541-dgpu-k2100m-hotp-maximized/UNTESTED-w541-dgpu-k2100m-hotp-maximized.config
new file: boards/UNTESTED-w541-dgpu-k2100m-maximized/UNTESTED-w541-dgpu-k2100m-maximized.config
new file: config/coreboot-w541-dgpu-k2100m-maximized.config

[tlaurion]

@TrustExecutor cleaned your PR for it to build from CircleCI at https://github.com/tlaurion/heads/tree/w541-dgpu

What you report with backup rom having different hashes for dgpu blobs vs downloaded is something. This is a first attempt to make sure we talk about the same results and to remove anything linked to artifacts from your host build station (so Making CI build roms from expected downloaded stuff). Please test CI produced rom and report back. If possible, cherry-pick commits from that branch and push in this PR. Commits need to be signed (commit --signoff) so that DCO step doesn't fail here. I built locally but cannot test.

• Is the EXE downloaded from lenovo latest available?
• Didnt compare with w530, but as you can see dgpu boards are not reported tested for a while
• Things changed in the past and to be honest I lost track of what was the status. You can check around when boards have been moved to UNTESTED to see what was needing testing with and report here on what is thought missing
• What I quickly seen is that libgfxinit is turned off (desired for dgpu boards) but not sure what happens with bootsplash
• Laptop beeping (BEEP OF DEATH and flashing under coreboot is linked to memory init failing normally. That is something. Weird that that happens only when dgpu is hybrid

That's all I have for now.

[tlaurion]

NRI (not using mrc for raminit) may be needed as stated under #1607 (comment) @TrustExecutor

[tlaurion]

@TrustExecutor put as draft meanwhile