thunderbolt: Fix some kernel-doc comments

Remove some warnings found by running scripts/kernel-doc,
which is caused by using 'make W=1'.

  drivers/thunderbolt/ctl.c:701: warning: expecting prototype for tb_cfg_start().
    Prototype was for tb_ctl_start() instead
  drivers/thunderbolt/ctl.c:722: warning: expecting prototype for tb_ctrl_stop().
    Prototype was for tb_ctl_stop() instead
  drivers/thunderbolt/ctl.c:930: warning: expecting prototype for tb_cfg_write().
    Prototype was for tb_cfg_write_raw() instead

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/thunderbolt/ctl.c

@@ -694,7 +694,7 @@ void tb_ctl_free(struct tb_ctl *ctl)
 }
 
 /**
- * tb_cfg_start() - start/resume the control channel
+ * tb_ctl_start() - start/resume the control channel
  * @ctl: Control channel to start
  */
 void tb_ctl_start(struct tb_ctl *ctl)
@@ -710,7 +710,7 @@ void tb_ctl_start(struct tb_ctl *ctl)
 }
 
 /**
- * tb_ctrl_stop() - pause the control channel
+ * tb_ctl_stop() - pause the control channel
  * @ctl: Control channel to stop
  *
  * All invocations of ctl->callback will have finished after this method
@@ -912,7 +912,7 @@ struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer,
 }
 
 /**
- * tb_cfg_write() - write from buffer into config space
+ * tb_cfg_write_raw() - write from buffer into config space
  * @ctl: Pointer to the control channel
  * @buffer: Data to write
  * @route: Route string of the router