drm/i915: enable vGPU detection for all

vGPU capability is handled by GVT-g host driver, not needed to
put extra HW check for vGPU detection. And we'll actually support
vGPU from BDW.
Signed-off-by: NPing Gao <ping.a.gao@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: drm-intel-fixes@lists.freedesktop.org
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160906040412.1274-2-zhenyuw@linux.intel.com
(cherry picked from commit 8ef89995)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/i915_vgpu.c

@@ -65,9 +65,6 @@ void i915_check_vgpu(struct drm_i915_private *dev_priv)
 
 	BUILD_BUG_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
 
-	if (!IS_HASWELL(dev_priv))
-		return;
-
 	magic = __raw_i915_read64(dev_priv, vgtif_reg(magic));
 	if (magic != VGT_MAGIC)
 		return;