Add PCI ID support for Radeon 540X (Polaris12) – currently shown as "unknown"

[MiNdMaZe409]

Hi,

On my Lenovo ThinkBook (model 20RM000VCA), radeontop correctly detects the GPU
architecture as POLARIS12, but the GPU name is displayed as "unknown".

Here is the PCI information for the AMD GPU:

$ lspci -nn | grep -iE "vga|display"
01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI]
Lexa [Radeon 540X/550X/630 / RX 640 / E9171 MCM] [1002:6987] (rev c3)

OpenGL renderer string (via radeonsi):
AMD Radeon 540X Series (radeonsi, polaris12, ACO, DRM 3.61)

It looks like the PCI ID 1002:6987 is missing from radeontop’s internal GPU database. Could you add support for this ID?

Suggested entry:
{ 0x1002, 0x6987, "Radeon 540X (Polaris12 / Lexa)" }

Thanks for maintaining this tool,

MiNdMaZe409