drm/i915/gt/uc/intel_guc_hwconfig: Demote a few non-conforming kerneldoc headers

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c:112: warning: Function parameter or member 'gt' not described in 'guc_hwconfig_init'
 drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c:112: warning: expecting prototype for intel_guc_hwconfig_init(). Prototype was for guc_hwconfig_init() instead
 drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c:145: warning: Function parameter or member 'gt' not described in 'intel_gt_init_hwconfig'
 drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c:158: warning: Function parameter or member 'gt' not described in 'intel_gt_fini_hwconfig'

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230331092607.700644-16-lee@kernel.org

drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c

@@ -102,7 +102,7 @@ static bool has_table(struct drm_i915_private *i915)
 	return false;
 }
 
-/**
+/*
  * intel_guc_hwconfig_init - Initialize the HWConfig
  *
  * Retrieve the HWConfig table from the GuC and save it locally.
@@ -136,7 +136,7 @@ static int guc_hwconfig_init(struct intel_gt *gt)
 	return 0;
 }
 
-/**
+/*
  * intel_gt_init_hwconfig - Initialize the HWConfig if available
  *
  * Retrieve the HWConfig table if available on the current platform.
@@ -149,7 +149,7 @@ int intel_gt_init_hwconfig(struct intel_gt *gt)
 	return guc_hwconfig_init(gt);
 }
 
-/**
+/*
  * intel_gt_fini_hwconfig - Finalize the HWConfig
  *
  * Free up the memory allocation holding the table.