drm cleanup 16/x: Add names to internal ioctl debug traces.

drm cleanup 16/x: Add names to internal ioctl debug traces.

With this it prints same output as linux, just 3 years later.
Aimed at drm_debug=0x600 mode.
Easier on the eyes and saves time:

 -[drm:drm_ioctl] pid=904, cmd=0xc03064b7, nr=0xb7, dev 0xffffffe1d6299720, auth=1
 -[drm:drm_ioctl] pid=904, cmd=0x80086409, nr=0x09, dev 0xffffffe1d6299720, auth=1
 -[drm:drm_ioctl] pid=904, cmd=0x2000641f, nr=0x1f, dev 0xffffffe1d6299720, auth=1
 -[drm:drm_ioctl] ret = 22
 -[drm:drm_ioctl] pid=904, cmd=0x80086409, nr=0x09, dev 0xffffffe1d6299720, auth=1
 -[drm:drm_ioctl] pid=904, cmd=0x80086409, nr=0x09, dev 0xffffffe1d6299720, auth=1
 -[drm:drm_ioctl] pid=904, cmd=0xc010646c, nr=0x2c, dev 0xffffffe1d6299720, auth=1
 +[drm:drm_ioctl] pid=904, dev=0xffffffe1d6299720, auth=1, DRM_IOCTL_MODE_SETPLANE
 +[drm:drm_ioctl] pid=904, dev=0xffffffe1d6299720, auth=1, DRM_IOCTL_GEM_CLOSE
 +[drm:drm_ioctl] pid=904, dev=0xffffffe1d6299720, auth=1, DRM_IOCTL_DROP_MASTER
 +[drm:drm_ioctl] ret = 22
 +[drm:drm_ioctl] pid=904, dev=0xffffffe1d6299720, auth=1, DRM_IOCTL_GEM_CLOSE
 +[drm:drm_ioctl] pid=904, dev=0xffffffe1d6299720, auth=1, DRM_IOCTL_GEM_CLOSE
 +[drm:drm_ioctl] pid=904, dev=0xffffffe1d6299720, auth=1, I915_GEM_WAIT