docs: hw/gpu.rst was missing Pascal
This is the apparently only location that doesn't include Pascal in a
descriptive list of GPU families. As this location ends up being presented
prominently in the documentation it is worth amending.
@@ -51,7 +51,7 @@ The GPU families
================
The GPUs can roughly be grouped into a dozen or so families: NV1, NV3/RIVA,
-NV4/TNT, Celsius, Kelvin, Rankine, Curie, Tesla, Fermi, Kepler, Maxwell. This
+NV4/TNT, Celsius, Kelvin, Rankine, Curie, Tesla, Fermi, Kepler, Maxwell and Pascal. This
aligns with big revisions of PGRAPH, the drawing engine of the card. While most
functionality was introduced in sync with PGRAPH revisions, some other
functionality [notably video decoding hardware] gets added in GPUs late in a GPU
