drm/i915: Make HAS_RUNTIME_PM only take dev_priv

Saves 960 bytes of .rodata strings.

v2: Add parantheses around dev_priv. (Ville Syrjala)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jani Nikula <jani.nikula@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 6c11168..ed1faf1 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -2758,7 +2758,6 @@
 void intel_runtime_pm_enable(struct drm_i915_private *dev_priv)
 {
 	struct pci_dev *pdev = dev_priv->drm.pdev;
-	struct drm_device *dev = &dev_priv->drm;
 	struct device *kdev = &pdev->dev;
 
 	pm_runtime_set_autosuspend_delay(kdev, 10000); /* 10s */
@@ -2770,7 +2769,7 @@
 	 * so the driver's own RPM reference tracking asserts also work on
 	 * platforms without RPM support.
 	 */
-	if (!HAS_RUNTIME_PM(dev)) {
+	if (!HAS_RUNTIME_PM(dev_priv)) {
 		pm_runtime_dont_use_autosuspend(kdev);
 		pm_runtime_get_sync(kdev);
 	} else {