drm/i915: invert the log inside intel_prepare_ddi

Do an early return in case we don't have DDI instead of having the
whole function inside an "if" statement.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_ddi.c

@@ -115,16 +115,17 @@ void intel_prepare_ddi(struct drm_device *dev)
 {
 	int port;
 
-	if (HAS_DDI(dev)) {
+	if (!HAS_DDI(dev))
+		return;
+
 	for (port = PORT_A; port < PORT_E; port++)
 		intel_prepare_ddi_buffers(dev, port, false);
 
-		/* DDI E is the suggested one to work in FDI mode, so program is as such by
-		 * default. It will have to be re-programmed in case a digital DP output
-		 * will be detected on it
+	/* DDI E is the suggested one to work in FDI mode, so program is as such
+	 * by default. It will have to be re-programmed in case a digital DP
+	 * output will be detected on it
 	 */
 	intel_prepare_ddi_buffers(dev, PORT_E, true);
-	}
 }
 
 static const long hsw_ddi_buf_ctl_values[] = {