DocBook/drm: Better wording

	information, like register offsets, command buffer status,

	register state for suspend/resume, etc.  At load time, a

	driver may simply allocate one and set drm_device.dev_priv

	appropriately; at unload the driver can free it and set

	drm_device.dev_priv to NULL.

	appropriately; it should be freed and drm_device.dev_priv set

	to NULL when the driver is unloaded.

      </para>

      <para>

	The DRM supports several counters which may be used for rough