gpu: host1x: Fix a kernel-doc warning

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2154295
Upstream Status: v5.19-rc1

commit fe696cc
Author:     Randy Dunlap <rdunlap@infradead.org>
AuthorDate: Sun Apr  3 15:53:54 2022 -0700
Commit:     Thierry Reding <treding@nvidia.com>
CommitDate: Wed Apr  6 15:08:17 2022 +0200

    Add @cache description to eliminate a kernel-doc warning.

    include/linux/host1x.h:104: warning: Function parameter or member 'cache' not described in 'host1x_client'

    Fixes: 1f39b1d ("drm/tegra: Implement buffer object cache")
    Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
    Cc: Thierry Reding <treding@nvidia.com>
    Cc: linux-tegra@vger.kernel.org
    Cc: David Airlie <airlied@linux.ie>
    Cc: Daniel Vetter <daniel@ffwll.ch>
    Cc: dri-devel@lists.freedesktop.org
    Signed-off-by: Thierry Reding <treding@nvidia.com>

Signed-off-by: Mika Penttilä <mpenttil@redhat.com>

Author: Mika Penttilä

include/linux/host1x.h

@@ -86,6 +86,7 @@ struct host1x_client_ops {
  * @parent: pointer to parent structure
  * @usecount: reference count for this structure
  * @lock: mutex for mutually exclusive concurrency
+ * @cache: host1x buffer object cache
  */
 struct host1x_client {
 	struct list_head list;