drm/i915: Make IS_HASWELL only take dev_priv

Saves 2432 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_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 463bf73..179f16b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1748,7 +1748,7 @@
 	I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_PPGTT_CACHE64B);
 
 	ecochk = I915_READ(GAM_ECOCHK);
-	if (IS_HASWELL(dev)) {
+	if (IS_HASWELL(dev_priv)) {
 		ecochk |= ECOCHK_PPGTT_WB_HSW;
 	} else {
 		ecochk |= ECOCHK_PPGTT_LLC_IVB;
@@ -2060,7 +2060,7 @@
 	ppgtt->base.pte_encode = ggtt->base.pte_encode;
 	if (intel_vgpu_active(dev_priv) || IS_GEN6(dev))
 		ppgtt->switch_mm = gen6_mm_switch;
-	else if (IS_HASWELL(dev))
+	else if (IS_HASWELL(dev_priv))
 		ppgtt->switch_mm = hsw_mm_switch;
 	else if (IS_GEN7(dev))
 		ppgtt->switch_mm = gen7_mm_switch;