drm/amdgpu/userq: fix user_queue parameters list

Sphinx reports htmldocs warning:

Documentation/gpu/amdgpu/module-parameters:7: drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c:1119: ERROR: Unexpected indentation. [docutils]

Fix the warning by using reST bullet list syntax for user_queue
parameter options, separated from preceding paragraph by a blank
line.

Fixes: fb20954 ("drm/amdgpu/userq: rework driver parameter")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20250422202956.176fb590@canb.auug.org.au/
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -1115,11 +1115,12 @@ module_param_named(rebar, amdgpu_rebar, int, 0444);
 
 /**
  * DOC: user_queue (int)
- * Enable user queues on systems that support user queues.
- * -1 = auto (ASIC specific default)
- *  0 = user queues disabled
- *  1 = user queues enabled and kernel queues enabled (if supported)
- *  2 = user queues enabled and kernel queues disabled
+ * Enable user queues on systems that support user queues. Possible values:
+ *
+ * - -1 = auto (ASIC specific default)
+ * -  0 = user queues disabled
+ * -  1 = user queues enabled and kernel queues enabled (if supported)
+ * -  2 = user queues enabled and kernel queues disabled
  */
 MODULE_PARM_DESC(user_queue, "Enable user queues (-1 = auto (default), 0 = disable, 1 = enable, 2 = enable UQs and disable KQs)");
 module_param_named(user_queue, amdgpu_user_queue, int, 0444);