Just a different colour to better match virtual addresses elsewhere.

s/ring->virtual_start/ring->vaddr/
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1469005202-9659-9-git-send-email-chris@chris-wilson.co.ukReviewed-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469017917-15134-8-git-send-email-chris@chris-wilson.co.uk