net: Remove casts of void *

Unnecessary casts of void * clutter the code.

These are the remainder casts after several specific
patches to remove netdev_priv and dev_priv.

Done via coccinelle script:

$ cat cast_void_pointer.cocci
@@
type T;
T *pt;
void *pv;
@@

- pt = (T *)pv;
+ pt = pv;

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>
diff --git a/net/irda/irlan/irlan_provider.c b/net/irda/irlan/irlan_provider.c
index b8af74a..8b61cf0 100644
--- a/net/irda/irlan/irlan_provider.c
+++ b/net/irda/irlan/irlan_provider.c
@@ -73,7 +73,7 @@
 
 	IRDA_DEBUG(4, "%s()\n", __func__ );
 
-	self = (struct irlan_cb *) instance;
+	self = instance;
 
 	IRDA_ASSERT(self != NULL, return -1;);
 	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
@@ -131,8 +131,8 @@
 
 	IRDA_DEBUG(0, "%s()\n", __func__ );
 
-	self = (struct irlan_cb *) instance;
-	tsap = (struct tsap_cb *) sap;
+	self = instance;
+	tsap = sap;
 
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
@@ -182,8 +182,8 @@
 
 	IRDA_DEBUG(4, "%s(), reason=%d\n", __func__ , reason);
 
-	self = (struct irlan_cb *) instance;
-	tsap = (struct tsap_cb *) sap;
+	self = instance;
+	tsap = sap;
 
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);