Consolidate fourcc.h

Move the copy in hw/xfree86/common to include/, and remove the one in
hw/kdrive/src/.

Fixes DIX glamor code including an xfree86 DDX header.
4 jobs for dix-cleanups in 4 minutes and 37 seconds (queued for 1 second)
Status Job ID Name Coverage
  Docker Image
passed #4539045
debian-testing

00:00:10

 
  Build And Test
passed #4539046
autotools

00:04:26

passed #4539047
meson

00:01:05

passed #4539048
meson-noglamor

00:00:50