uapi: fix linux/tls.h userspace compilation error

Move inclusion of a private kernel header <net/tcp.h>
from uapi/linux/tls.h to its only user - net/tls.h,
to fix the following linux/tls.h userspace compilation error:

/usr/include/linux/tls.h:41:21: fatal error: net/tcp.h: No such file or directory

As to this point uapi/linux/tls.h was totaly unusuable for userspace,
cleanup this header file further by moving other redundant includes
to net/tls.h.

Fixes: 3c4d7559 ("tls: kernel TLS support")
Cc: <stable@vger.kernel.org> # v4.13+
Signed-off-by: NDmitry V. Levin <ldv@altlinux.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/tls.h

@@ -35,6 +35,10 @@
 #define _TLS_OFFLOAD_H
 
 #include <linux/types.h>
+#include <asm/byteorder.h>
+#include <linux/socket.h>
+#include <linux/tcp.h>
+#include <net/tcp.h>
 
 #include <uapi/linux/tls.h>
 

include/uapi/linux/tls.h

@@ -35,10 +35,6 @@
 #define _UAPI_LINUX_TLS_H
 
 #include <linux/types.h>
-#include <asm/byteorder.h>
-#include <linux/socket.h>
-#include <linux/tcp.h>
-#include <net/tcp.h>
 
 /* TLS socket options */
 #define TLS_TX			1	/* Set transmit parameters */