eventfs: Fix kerneldoc of eventfs_remove_rec()

The eventfs_remove_rec() had some missing parameters in the kerneldoc
comment above it. Also, rephrase the description a bit more to have a bit
more correct grammar.

Link: https://lore.kernel.org/linux-trace-kernel/20231030121523.0b2225a7@gandalf.local.home

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Fixes: 5790b1fb ("eventfs: Remove eventfs_file and just use eventfs_inode");
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310052216.4SgqasWo-lkp@intel.com/Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

fs/tracefs/event_inode.c

@@ -796,9 +796,11 @@ static void free_ei(struct rcu_head *head)
 /**
  * eventfs_remove_rec - remove eventfs dir or file from list
  * @ei: eventfs_inode to be removed.
+ * @head: the list head to place the deleted @ei and children
+ * @level: prevent recursion from going more than 3 levels deep.
  *
- * This function recursively remove eventfs_inode which
- * contains info of file or dir.
+ * This function recursively removes eventfs_inodes which
+ * contains info of files and/or directories.
  */
 static void eventfs_remove_rec(struct eventfs_inode *ei, struct list_head *head, int level)
 {