accel: Link to compute accelerator subsystem intro

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2160457
Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git (v6.3.2)

commit 6e2fc85
Author:     Bagas Sanjaya <bagasdotme@gmail.com>
AuthorDate: Tue Mar  7 11:35:26 2023 +0700
Commit:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CommitDate: Thu May 11 23:17:02 2023 +0900

    [ Upstream commit 6d179f8 ]

    Commit 2c204f3 ("accel: add dedicated minor for accelerator
    devices") adds link to accelerator nodes section of DRM internals doc
    (Documentation/gpu/drm-internals.rst), but the target doesn't exist.
    Instead, there is only an introduction doc for computer accelerator
    subsytem.

    Link to that doc until there is documentation of accelerator internals.

    Fixes: 2c204f3 ("accel: add dedicated minor for accelerator devices")
    Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
    Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
    Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>

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

Author: Mika Penttilä

include/drm/drm_file.h

@@ -408,7 +408,8 @@ static inline bool drm_is_render_client(const struct drm_file *file_priv)
  * Returns true if this is an open file of the compute acceleration node, i.e.
  * &drm_file.minor of @file_priv is a accel minor.
  *
- * See also the :ref:`section on accel nodes <drm_accel_node>`.
+ * See also :doc:`Introduction to compute accelerators subsystem
+ * </accel/introduction>`.
  */
 static inline bool drm_is_accel_client(const struct drm_file *file_priv)
 {