On Ubuntu 18.04LTS, 18.04.1LTS, and Ubuntu 18.04.2LTS, as well as Ubuntu 18.10,
and even with Oibaf's PPA for those released, the R200 driver is not included,
causing the Radeon 9000M (rv250) on my ThinkPad T42 to default to the LLVMPipe
driver.

When attempting to compile Mesa with the R200 driver, on Solus, Meson spits out
the following error: ERROR:  Options "r200" are not in allowed choices: ",
auto, kmsro, radeonsi, r300, r600, nouveau, freedreno, swrast, v3d, vc4,
etnaviv, tegra, i915, svga, virgl, swr, panfrost".

Any idea why I cannot compile the R200 driver?