drmdoc: sort props by name

This ensures the output order is deterministic.

drmdoc: use go/format to format generated files

Add descriptions to filter links

Add driver filter to device list

go fmt

Enable cache header

Display kernel docs on prop page

drmdoc: new package

Remove extraneous parentheses

Add object type filter to properties list

Add missing drm.go

Check property types consistency

Merge all property specs

Update dependencies

Fix property page with no supporting driver

drmtree: handle USB devices

References: https://github.com/ascent12/drm_info/pull/49

go fmt

Add tooltip with format/modifier hex code in /formats

Improve layout on tabular pages

drmtree: fix empty IN_FORMATS handling

Some drivers expose an empty IN_FORMATS prop (e.g. exynos).

Move database functions to a separate package