rsi: Fix missing function name in comments

Fixes the following W=1 kernel build warning(s):

 drivers/net/wireless/rsi/rsi_91x_mgmt.c:1550: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst

Cc: Amitkumar Karwar <amitkarwar@gmail.com>
Cc: Siva Rebbagondla <siva8118@gmail.com>
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210517050141.61488-10-shenyang39@huawei.com

drivers/net/wireless/rsi/rsi_91x_mgmt.c

@@ -1547,8 +1547,8 @@ static int rsi_eeprom_read(struct rsi_common *common)
 }
 
 /**
- * This function sends a frame to block/unblock
- * data queues in the firmware
+ * rsi_send_block_unblock_frame() - This function sends a frame to block/unblock
+ *                                  data queues in the firmware
  *
  * @common: Pointer to the driver private structure.
  * @block_event: Event block if true, unblock if false