[PATCH] drm/xe: xe_guc_pc.c: fix DOC underlines

[Randy Dunlap <rdunlap@infradead.org>]

Apparently a recent change in docutils has made checking of section
heading levels (underline style) be more careful.

There are 2 heading underline style errors reported here. Repair them by
changing the underline style from Chapter (using '=') to Section (using
'-') since they are used within a Chapter already (in xe_firmware.rst).

"""
Documentation/gpu/xe/xe_firmware.rst:31: drivers/gpu/drm/xe/xe_guc_pc.c:75: ERROR: A level 2 section cannot be used here.

Frequency management:
=====================

Established title styles: =/= =

The parent of level 2 sections cannot be reached. The parser is at section level 2 but the current node has only 0 parent section(s).
One reason may be a high level section used in a directive that parses its content into a base node not attached to the document
(up to Docutils 0.21, these sections were silently dropped). [docutils]
Documentation/gpu/xe/xe_firmware:31: ../drivers/gpu/drm/xe/xe_guc_pc.c:86: ERROR: A level 2 section cannot be used here.

Render-C States:
================

Established title styles: =/= =

The parent of level 2 sections cannot be reached. The parser is at section level 2 but the current node has only 0 parent section(s).
One reason may be a high level section used in a directive that parses its content into a base node not attached to the document
(up to Docutils 0.21, these sections were silently dropped). [docutils]
"""

Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
---
Sorry for the resend. I didn't have .gitconfig present so parts of
this didn't work as intended.

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-xe@lists.freedesktop.org
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
---
 drivers/gpu/drm/xe/xe_guc_pc.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- linux-next-20251010.orig/drivers/gpu/drm/xe/xe_guc_pc.c
+++ linux-next-20251010/drivers/gpu/drm/xe/xe_guc_pc.c
@@ -74,8 +74,8 @@
  * connected power conservation features in the GuC firmware. The firmware
  * exposes a programming interface to the host for the control of SLPC.
  *
- * Frequency management:
- * =====================
+ * Frequency management
+ * --------------------
  *
  * Xe driver enables SLPC with all of its defaults features and frequency
  * selection, which varies per platform.
@@ -85,8 +85,8 @@
  * thus saving power. Base profile is default and ensures balanced performance
  * for any workload.
  *
- * Render-C States:
- * ================
+ * Render-C States
+ * ---------------
  *
  * Render-C states is also a GuC PC feature that is now enabled in Xe for
  * all platforms.