drm/i915: Make IS_IVYBRIDGE only take dev_priv

Saves 848 bytes of .rodata strings.

v2: Add parantheses around dev_priv. (Ville Syrjala)
v3: Rebase.

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_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index bb14e95..b1142aa 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -114,7 +114,7 @@
 		      fmt, ##__VA_ARGS__)
 
 
-static enum intel_pch intel_virt_detect_pch(struct drm_device *dev)
+static enum intel_pch intel_virt_detect_pch(struct drm_i915_private *dev_priv)
 {
 	enum intel_pch ret = PCH_NOP;
 
@@ -125,16 +125,16 @@
 	 * make an educated guess as to which PCH is really there.
 	 */
 
-	if (IS_GEN5(dev)) {
+	if (IS_GEN5(dev_priv)) {
 		ret = PCH_IBX;
 		DRM_DEBUG_KMS("Assuming Ibex Peak PCH\n");
-	} else if (IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
+	} else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv)) {
 		ret = PCH_CPT;
 		DRM_DEBUG_KMS("Assuming CouarPoint PCH\n");
-	} else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
+	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
 		ret = PCH_LPT;
 		DRM_DEBUG_KMS("Assuming LynxPoint PCH\n");
-	} else if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) {
+	} else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 		ret = PCH_SPT;
 		DRM_DEBUG_KMS("Assuming SunrisePoint PCH\n");
 	}
@@ -178,12 +178,14 @@
 			} else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_CPT;
 				DRM_DEBUG_KMS("Found CougarPoint PCH\n");
-				WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
+				WARN_ON(!(IS_GEN6(dev_priv) ||
+					IS_IVYBRIDGE(dev_priv)));
 			} else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 				/* PantherPoint is CPT compatible */
 				dev_priv->pch_type = PCH_CPT;
 				DRM_DEBUG_KMS("Found PantherPoint PCH\n");
-				WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
+				WARN_ON(!(IS_GEN6(dev_priv) ||
+					IS_IVYBRIDGE(dev_priv)));
 			} else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_LPT;
 				DRM_DEBUG_KMS("Found LynxPoint PCH\n");
@@ -217,7 +219,8 @@
 					    PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
 				    pch->subsystem_device ==
 					    PCI_SUBDEVICE_ID_QEMU)) {
-				dev_priv->pch_type = intel_virt_detect_pch(dev);
+				dev_priv->pch_type =
+					intel_virt_detect_pch(dev_priv);
 			} else
 				continue;