mwifiex: fix make namespacecheck warnings

This patch takes care of warnings found by running
'make namespacecheck':

1. Remove dead code.
2. Reorder function definitions to avoid forward declarations.
3. Remove unnecessary function/structure declarations and mark
   them as static.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index d39bb72..ea4a29b 100644
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -293,8 +293,8 @@
  * This function prepares the correct firmware command and
  * issues it.
  */
-int mwifiex_set_hs_params(struct mwifiex_private *priv, u16 action,
-			  int cmd_type, struct mwifiex_ds_hs_cfg *hs_cfg)
+static int mwifiex_set_hs_params(struct mwifiex_private *priv, u16 action,
+				 int cmd_type, struct mwifiex_ds_hs_cfg *hs_cfg)
 
 {
 	struct mwifiex_adapter *adapter = priv->adapter;