ipv4: af_inet: make it explicitly non-modular

The Makefile controlling compilation of this file is obj-y,
meaning that it currently is never being built as a module.

Since MODULE_ALIAS is a no-op for non-modular code, we can simply
remove the MODULE_ALIAS_NETPROTO variant used here.

We replace module.h with kmod.h since the file does make use of
request_module() in order to load other modules from here.

We don't have to worry about init.h coming in via the removed
module.h since the file explicitly includes init.h already.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/af_inet.c

@@ -73,7 +73,7 @@
 #include <linux/socket.h>
 #include <linux/in.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/kmod.h>
 #include <linux/sched.h>
 #include <linux/timer.h>
 #include <linux/string.h>
@@ -1916,6 +1916,3 @@ static int __init ipv4_proc_init(void)
 	return 0;
 }
 #endif /* CONFIG_PROC_FS */
-
-MODULE_ALIAS_NETPROTO(PF_INET);
-