net: add missing includes of linux/net.h

linux/net.h will soon not be included by linux/skbuff.h.
Fix the cases where source files were depending on the implicit
include.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/intersil/orinoco/hermes.c

@@ -38,6 +38,7 @@
  * under either the MPL or the GPL.
  */
 
+#include <linux/net.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>

include/linux/igmp.h

@@ -15,6 +15,7 @@
 #include <linux/in.h>
 #include <linux/ip.h>
 #include <linux/refcount.h>
+#include <linux/sockptr.h>
 #include <uapi/linux/igmp.h>
 
 static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)