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/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index aed4d28..3ad8274 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3480,7 +3480,7 @@
 		level = I915_CACHE_LLC;
 		break;
 	case I915_CACHING_DISPLAY:
-		level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE;
+		level = HAS_WT(dev_priv) ? I915_CACHE_WT : I915_CACHE_NONE;
 		break;
 	default:
 		return -EINVAL;
@@ -3538,7 +3538,8 @@
 	 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
 	 */
 	ret = i915_gem_object_set_cache_level(obj,
-					      HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE);
+					      HAS_WT(to_i915(obj->base.dev)) ?
+					      I915_CACHE_WT : I915_CACHE_NONE);
 	if (ret) {
 		vma = ERR_PTR(ret);
 		goto err_unpin_display;