drm/xe/oa: Fix kernel doc in xe_drm.h

Fix kernel doc in xe_drm.h. Also eliminate private/non-abi enum
definitions.

v2: Remove __DRM_XE_PERF_TYPE_MAX since it is unused (Michal)
v3: Also remove DRM_XE_OA_PROPERTY_MAX since it can also be
    eliminated (Michal)
Suggested-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240623203119.3840283-1-ashutosh.dixit@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_oa.c

@@ -1684,6 +1684,7 @@ static const xe_oa_user_extension_fn xe_oa_user_extension_funcs[] = {
 	[DRM_XE_OA_EXTENSION_SET_PROPERTY] = xe_oa_user_ext_set_property,
 };
 
+#define MAX_USER_EXTENSIONS	16
 static int xe_oa_user_extensions(struct xe_oa *oa, u64 extension, int ext_number,
 				 struct xe_oa_open_param *param)
 {
@@ -1692,7 +1693,7 @@ static int xe_oa_user_extensions(struct xe_oa *oa, u64 extension, int ext_number
 	int err;
 	u32 idx;
 
-	if (XE_IOCTL_DBG(oa->xe, ext_number >= DRM_XE_OA_PROPERTY_MAX))
+	if (XE_IOCTL_DBG(oa->xe, ext_number >= MAX_USER_EXTENSIONS))
 		return -E2BIG;
 
 	err = __copy_from_user(&ext, address, sizeof(ext));

include/uapi/drm/xe_drm.h

@@ -1379,8 +1379,8 @@ struct drm_xe_wait_user_fence {
  * enum drm_xe_perf_type - Perf stream types
  */
 enum drm_xe_perf_type {
+	/** @DRM_XE_PERF_TYPE_OA: OA perf stream type */
 	DRM_XE_PERF_TYPE_OA,
-	__DRM_XE_PERF_TYPE_MAX, /* non-ABI */
 };
 
 /**
@@ -1611,9 +1611,6 @@ enum drm_xe_oa_property_id {
 	 * pass along with @DRM_XE_OA_PROPERTY_EXEC_QUEUE_ID or will default to 0.
 	 */
 	DRM_XE_OA_PROPERTY_OA_ENGINE_INSTANCE,
-
-	/** @DRM_XE_OA_PROPERTY_MAX: non-ABI */
-	DRM_XE_OA_PROPERTY_MAX
 };
 
 /**