Remove pcspkrd

See merge request !254

graphics/graphics-ipc: Fix Damage::clip

Closes #51

See merge request !253

The PC speaker device is not a general purpose audio device, but only
capable of playing beeps. While pcspkrd does currently get built, it
never actually gets started at startup. There is also no program
anywhere inside Redox OS capable of playing any sound through pcspkrd.
And finally basically the thing it is used for on modern systems is to
emit a beep when pressing backspace in a VT while there is no input
buffered. I personally find that beep rather annoying and have disabled
the Linux counterpart to pcspkrd on my system because of this.

inputd: Avoid usage of legacy scheme path format

See merge request !252

Move bgad and xhcid to redox-scheme

See merge request !251

Bunch of improvements to usb storage

See merge request !250

configuration_value is not an index into config_descs, so scan for a
config_desc with the right configuration_value instead. And fix get_desc
getting confused by companion descriptors.

Mostly unify disk scheme implementations

See merge request !249

lived and usbscsid still keep their old scheme implementations.

Deduplicate a fair bit of code between block device drivers

See merge request !248

This allows it to contain non-'static disks.

It should be read when creating the struct implementing Disk and every
disk needs to have some block length.

Vendor and cleanup partitionlib

See merge request !247

A bunch of improvements to the graphics subsystem

See merge request !246

This matches the Linux DRM name.

The fields should never be negative and this saves a couple of casts.

This is necessary for implementing hardware cursor support.

It is quite likely that the next graphics API won't be the last one and
as such would become a legacy API too. Consistently using version
numbers makes it easier to refer to the exact version you mean.

This way the drivers don't have to special case switching between VTs.