Input: docs - split input docs into kernel- and user-facing

Split input documentation into several groups: kernel- and user-facing, and
notes about individual device drivers. Move device drivers docs into a
separate subdirectory.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/Documentation/input/index.rst b/Documentation/input/index.rst
index b25a671..7a3e71c 100644
--- a/Documentation/input/index.rst
+++ b/Documentation/input/index.rst
@@ -8,42 +8,9 @@
    :maxdepth: 2
    :numbered:
 
-   input
-   input-programming
-   event-codes
-   joydev/index
-   multi-touch-protocol
-   gamepad
-   gameport-programming
-   ff
-   notifier
-   userio
-
-Input drivers
-=============
-
-.. toctree::
-   :maxdepth: 2
-   :numbered:
-
-   alps
-   amijoy
-   appletouch
-   atarikbd
-   bcm5974
-   cma3000_d0x
-   cs461x
-   edt-ft5x06
-   elantech
-   iforce-protocol
-   joystick-parport
-   gpio-tilt
-   ntrig
-   rotary-encoder
-   sentelic
-   walkera0701
-   xpad
-   yealink
+   input_uapi
+   input_kapi
+   devices/index
 
 .. only::  subproject and html