net: strparser: make it explicitly non-modular

The Kconfig currently controlling compilation of this code is:

net/strparser/Kconfig:config STREAM_PARSER
net/strparser/Kconfig:  def_bool n

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.  For
clarity, we change the fcn name mod_init to dev_init at the same time.

We replace module.h with init.h and export.h ; the latter since this
file exports some syms.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/strparser/strparser.c

@@ -14,7 +14,8 @@
 #include <linux/file.h>
 #include <linux/in.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/init.h>
 #include <linux/net.h>
 #include <linux/netdevice.h>
 #include <linux/poll.h>
@@ -545,7 +546,7 @@ void strp_check_rcv(struct strparser *strp)
 }
 EXPORT_SYMBOL_GPL(strp_check_rcv);
 
-static int __init strp_mod_init(void)
+static int __init strp_dev_init(void)
 {
 	strp_wq = create_singlethread_workqueue("kstrp");
 	if (unlikely(!strp_wq))
@@ -553,11 +554,4 @@ static int __init strp_mod_init(void)
 
 	return 0;
 }
-
-static void __exit strp_mod_exit(void)
-{
-	destroy_workqueue(strp_wq);
-}
-module_init(strp_mod_init);
-module_exit(strp_mod_exit);
-MODULE_LICENSE("GPL");
+device_initcall(strp_dev_init);