rsi: rsi_91x_sdio: Fix a few kernel-doc related issues

- File headers do not make for good kernel-doc candidates
 - Kernel-doc header lines should start with " *"
 - Fix doc-rot issue

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

 drivers/net/wireless/rsi/rsi_91x_sdio.c:25: warning: cannot understand function prototype: 'u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL; '
 drivers/net/wireless/rsi/rsi_91x_sdio.c:802: warning: bad line:                                    from the device.
 drivers/net/wireless/rsi/rsi_91x_sdio.c:842: warning: Function parameter or member 'pfunction' not described in 'rsi_init_sdio_interface'
 drivers/net/wireless/rsi/rsi_91x_sdio.c:842: warning: Excess function parameter 'pkt' description in 'rsi_init_sdio_interface'

Cc: Amitkumar Karwar <amitkarwar@gmail.com>
Cc: Siva Rebbagondla <siva8118@gmail.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200826093401.1458456-17-lee.jones@linaro.org

drivers/net/wireless/rsi/rsi_91x_sdio.c

-/**
+/*
  * Copyright (c) 2014 Redpine Signals Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
@@ -799,7 +799,7 @@ static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
 
 /**
  * rsi_sdio_host_intf_read_pkt() - This function reads the packet
-				   from the device.
+ *				   from the device.
  * @adapter: Pointer to the adapter data structure.
  * @pkt: Pointer to the packet data to be read from the the device.
  * @length: Length of the data to be read from the device.
@@ -832,11 +832,10 @@ int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
  * rsi_init_sdio_interface() - This function does init specific to SDIO.
  *
  * @adapter: Pointer to the adapter data structure.
- * @pkt: Pointer to the packet data to be read from the the device.
+ * @pfunction: Pointer to the sdio_func structure.
  *
  * Return: 0 on success, -1 on failure.
  */
-
 static int rsi_init_sdio_interface(struct rsi_hw *adapter,
 				   struct sdio_func *pfunction)
 {