drm/i915: Make IS_BROADWELL only take dev_priv

Saves 1808 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 ed1faf1..77ef03c 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -288,7 +288,6 @@
 static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
 {
 	struct pci_dev *pdev = dev_priv->drm.pdev;
-	struct drm_device *dev = &dev_priv->drm;
 
 	/*
 	 * After we re-enable the power well, if we touch VGA register 0x3d5
@@ -304,7 +303,7 @@
 	outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
 	vga_put(pdev, VGA_RSRC_LEGACY_IO);
 
-	if (IS_BROADWELL(dev))
+	if (IS_BROADWELL(dev_priv))
 		gen8_irq_power_well_post_enable(dev_priv,
 						1 << PIPE_C | 1 << PIPE_B);
 }