drm/i915: Use the gt in HAS_ENGINE

A follow up patch will move the engine mask under the gt structure,
so get ready for that.

v2: switch the remaining gvt case using dev_priv->gt to gvt->gt (Chris)

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Andi Shyti <andi.shyti@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> #v1
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200708003952.21831-3-daniele.ceraolospurio@intel.com
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 2d980b8..ea1f79d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7114,7 +7114,7 @@ static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
 
 	/* This is not a WA. Enable VD HCP & MFX_ENC powergate */
 	for (i = 0; i < I915_MAX_VCS; i++) {
-		if (HAS_ENGINE(dev_priv, _VCS(i)))
+		if (HAS_ENGINE(&dev_priv->gt, _VCS(i)))
 			vd_pg_enable |= VDN_HCP_POWERGATE_ENABLE(i) |
 					VDN_MFX_POWERGATE_ENABLE(i);
 	}