drm: Prefer kmalloc_array() over kmalloc() with multiply

Fixes a couple of checkpatch warnings regarding the use of kmalloc()
with a multiplication. kmalloc_array() is the preferred API.
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_crtc.c

@@ -1174,7 +1174,7 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
 	plane->base.properties = &plane->properties;
 	plane->dev = dev;
 	plane->funcs = funcs;
-	plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
+	plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
 					    GFP_KERNEL);
 	if (!plane->format_types) {
 		DRM_DEBUG_KMS("out of memory when allocating plane\n");
@@ -2705,7 +2705,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 			goto out;
 		}
 
-		connector_set = kmalloc(crtc_req->count_connectors *
+		connector_set = kmalloc_array(crtc_req->count_connectors,
 					      sizeof(struct drm_connector *),
 					      GFP_KERNEL);
 		if (!connector_set) {