drm/i915: Use the direct mapping of pipe->crtc

Why iterate all the crtcs to find the pipe, when we already know which
crtc is attached to which pipe?

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 7bf7311..b15c9da 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -322,7 +322,7 @@
 		struct drm_crtc *crtc;
 		int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 
-		crtc = intel_get_crtc_from_pipe(dev, pipe);
+		crtc = intel_get_crtc_for_pipe(dev, pipe);
 		if (crtc) {
 			mode = intel_crtc_mode_get(dev, crtc);
 			if (mode) {