drm/i915/gtt: Remove vgpu check for gen6

Since vgpu is not supported on Haswell or any other gen6/7, we do not
need to check and act upon it's enablement.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180608150435.15010-2-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -2024,7 +2024,7 @@ static struct i915_hw_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915)
 	ppgtt->vm.dma = &i915->drm.pdev->dev;
 
 	ppgtt->vm.pte_encode = ggtt->vm.pte_encode;
-	if (intel_vgpu_active(i915) || IS_GEN6(i915))
+	if (IS_GEN6(i915))
 		ppgtt->switch_mm = gen6_mm_switch;
 	else if (IS_GEN7(i915))
 		ppgtt->switch_mm = gen7_mm_switch;