wireless: Remove casts to same type

Adding casts of objects to the same type is unnecessary
and confusing for a human reader.

For example, this cast:

        int y;
        int *p = (int *)&y;

I used the coccinelle script below to find and remove these
unnecessary casts.  I manually removed the conversions this
script produces of casts with __force, __iomem and __user.

@@
type T;
T *p;
@@

-       (T *)p
+       p

Neatened the mwifiex_deauthenticate_infra function which
was doing odd things with array pointers and not using
is_zero_ether_addr.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c
index a06cc28..668dd27 100644
--- a/drivers/net/wireless/libertas/debugfs.c
+++ b/drivers/net/wireless/libertas/debugfs.c
@@ -483,7 +483,7 @@
 		res = -EFAULT;
 		goto out_unlock;
 	}
-	priv->mac_offset = simple_strtoul((char *)buf, NULL, 16);
+	priv->mac_offset = simple_strtoul(buf, NULL, 16);
 	res = count;
 out_unlock:
 	free_page(addr);
@@ -565,7 +565,7 @@
 		res = -EFAULT;
 		goto out_unlock;
 	}
-	priv->bbp_offset = simple_strtoul((char *)buf, NULL, 16);
+	priv->bbp_offset = simple_strtoul(buf, NULL, 16);
 	res = count;
 out_unlock:
 	free_page(addr);