drm/i915/gvt: Fix build failure after intel_engine_cs change

Change GVT-g code reference for intel_engine_cs from static array to
allocated pointer after commit 3b3f1650b1ca ("drm/i915: Allocate
intel_engine_cs structure only for the enabled engines").

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161018014007.29369-1-zhenyuw@linux.intel.com

drivers/gpu/drm/i915/gvt/execlist.c

@@ -39,7 +39,7 @@
 #define _EL_OFFSET_STATUS_PTR   0x3A0
 
 #define execlist_ring_mmio(gvt, ring_id, offset) \
-	(gvt->dev_priv->engine[ring_id].mmio_base + (offset))
+	(gvt->dev_priv->engine[ring_id]->mmio_base + (offset))
 
 #define valid_context(ctx) ((ctx)->valid)
 #define same_context(a, b) (((a)->context_id == (b)->context_id) && \

drivers/gpu/drm/i915/gvt/handlers.c

@@ -134,7 +134,7 @@ static int render_mmio_to_ring_id(struct intel_gvt *gvt, unsigned int reg)
 
 	reg &= ~GENMASK(11, 0);
 	for (i = 0; i < I915_NUM_ENGINES; i++) {
-		if (gvt->dev_priv->engine[i].mmio_base == reg)
+		if (gvt->dev_priv->engine[i]->mmio_base == reg)
 			return i;
 	}
 	return -1;

drivers/gpu/drm/i915/gvt/scheduler.c

@@ -68,7 +68,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload)
 			workload->ctx_desc.lrca);
 
 	context_page_num = intel_lr_context_size(
-			&gvt->dev_priv->engine[ring_id]);
+			gvt->dev_priv->engine[ring_id]);
 
 	context_page_num = context_page_num >> PAGE_SHIFT;
 
@@ -171,7 +171,7 @@ static int dispatch_workload(struct intel_vgpu_workload *workload)
 	shadow_ctx->desc_template = workload->ctx_desc.addressing_mode <<
 				    GEN8_CTX_ADDRESSING_MODE_SHIFT;
 
-	workload->req = i915_gem_request_alloc(&dev_priv->engine[ring_id],
+	workload->req = i915_gem_request_alloc(dev_priv->engine[ring_id],
 					       shadow_ctx);
 	if (IS_ERR_OR_NULL(workload->req)) {
 		gvt_err("fail to allocate gem request\n");
@@ -298,7 +298,7 @@ static void update_guest_context(struct intel_vgpu_workload *workload)
 			workload->ctx_desc.lrca);
 
 	context_page_num = intel_lr_context_size(
-			&gvt->dev_priv->engine[ring_id]);
+			gvt->dev_priv->engine[ring_id]);
 
 	context_page_num = context_page_num >> PAGE_SHIFT;