drm/i915/gvt: Use ARRAY_SIZE for vgpu_types

Prefer ARRAY_SIZE instead of using sizeof

Fixes coccicheck warning: Use ARRAY_SIZE
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NAishwarya Ramakrishnan <aishwaryarj100@gmail.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200518150336.15265-1-aishwaryarj100@gmail.com

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

@@ -124,7 +124,7 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
 	 */
 	low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE;
 	high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE;
-	num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]);
+	num_types = ARRAY_SIZE(vgpu_types);
 
 	gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type),
 			     GFP_KERNEL);