docbook: move pipe and splice to filesystems docbook

Move pipes and splice docbook to filesystems book.
kernel-api book is huge (10x most other books) & slow to process.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Documentation/DocBook/filesystems.tmpl

@@ -398,4 +398,24 @@ an example.
 
   </chapter>
 
+  <chapter id="splice">
+      <title>splice API</title>
+  <para>
+	splice is a method for moving blocks of data around inside the
+	kernel, without continually transferring them between the kernel
+	and user space.
+  </para>
+!Ffs/splice.c
+  </chapter>
+
+  <chapter id="pipes">
+      <title>pipes API</title>
+  <para>
+	Pipe interfaces are all for in-kernel (builtin image) use.
+	They are not exported for use by modules.
+  </para>
+!Iinclude/linux/pipe_fs_i.h
+!Ffs/pipe.c
+  </chapter>
+
 </book>

Documentation/DocBook/kernel-api.tmpl

@@ -712,24 +712,4 @@ X!Idrivers/video/console/fonts.c
 !Edrivers/i2c/i2c-core.c
   </chapter>
 
-  <chapter id="splice">
-      <title>splice API</title>
-  <para>
-	splice is a method for moving blocks of data around inside the
-	kernel, without continually transferring them between the kernel
-	and user space.
-  </para>
-!Ffs/splice.c
-  </chapter>
-
-  <chapter id="pipes">
-      <title>pipes API</title>
-  <para>
-	Pipe interfaces are all for in-kernel (builtin image) use.
-	They are not exported for use by modules.
-  </para>
-!Iinclude/linux/pipe_fs_i.h
-!Ffs/pipe.c
-  </chapter>
-
 </book>