global_data: Fix comment for dm_driver_rt

This comment is in the wrong format, so reports an error with
'make htmldocs'. Fix it.

Fixes: a294ead8d25 ("dm: Use an allocated array for run-time device info")
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 87d827d..887b5c2 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -196,7 +196,7 @@
 	 */
 	struct list_head uclass_root;
 # if CONFIG_IS_ENABLED(OF_PLATDATA)
-        /** Dynamic info about the driver */
+	/** @dm_driver_rt: Dynamic info about the driver */
 	struct driver_rt *dm_driver_rt;
 # endif
 #endif