drm/i915: INTEL_INFO->gen supercedes i8xx, i9xx, i965g

Avoid confusion between i965g meaning broadwater and the gen4+ chipset
families.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 30abe7a..92ff8f3 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -116,7 +116,7 @@
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (IS_I965G(dev))
+	if (INTEL_INFO(dev)->gen >= 4)
 		return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
 
 	if (IS_GEN2(dev))
@@ -138,7 +138,7 @@
 			max >>= 17;
 		} else {
 			max >>= 16;
-			if (!IS_I965G(dev))
+			if (INTEL_INFO(dev)->gen < 4)
 				max &= ~1;
 		}