Categories other than Base system are emitted in alphabetical order, so
a category describing the hardware a device has would land halfway down
the package menu among unrelated ones. Emit Hardware support first
instead, ahead of Base system, since which device classes an image
supports is the first thing to choose and everything else follows from
it.
print_package_config_category() returns early for a category no package
uses, so this has no effect until such a package exists.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>