drm/i915: Fix typo from "Enable DisplayPort Audio"

Hi,

while I looked through your changes in drm-intel git tree (as I've got
a pressure for supporting DisplayPort audio), I stumbled on the
possible bug in the commit a9756bb5b2

	Author: Zhenyu Wang <zhenyuw@linux.intel.com>
	Date:   Sun Sep 19 13:09:06 2010 +0800
	drm/i915: Enable DisplayPort audio

In this commit, you changed the return value of g4x_dp_detect()
to "bit", but it should be "status", I suppose.

[ickle: mea culpa.]
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31094
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_dp.c

@@ -1517,7 +1517,7 @@ g4x_dp_detect(struct intel_dp *intel_dp)
 			status = connector_status_connected;
 	}
 
-	return bit;
+	return status;
 }
 
 /**