Input: db9/CD32 - convert documentation into ReST format

Currently, it misses a title, and the table is not valid for ReST. Adjust
them, in order for it to be able to parse on Sphinx.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/input/cd32.txt

+==========
+Amiga CD32
+==========
+
 I have written a small patch that let's me use my Amiga CD32
 joypad connected to the parallel port. Thought I'd share it with you so
 you can add it to the list of supported joysticks (hopefully someone will
@@ -5,15 +9,16 @@ find it useful).
 
 It needs the following wiring:
 
-CD32 pad   |   Parallel port
-----------------------------
-1 (Up)     |    2 (D0)
-2 (Down)   |    3 (D1)
-3 (Left)   |    4 (D2)
-4 (Right)  |    5 (D3)
-5 (Fire3)  |   14 (AUTOFD)
-6 (Fire1)  |   17 (SELIN)
-7 (+5V)    |    1 (STROBE)
-8 (Gnd)    |   18 (Gnd)
-9 (Fire2)  |    7 (D5)
-
+===========    =============
+CD32 pad       Parallel port
+===========    =============
+1 (Up)          2 (D0)
+2 (Down)        3 (D1)
+3 (Left)        4 (D2)
+4 (Right)       5 (D3)
+5 (Fire3)      14 (AUTOFD)
+6 (Fire1)      17 (SELIN)
+7 (+5V)         1 (STROBE)
+8 (Gnd)        18 (Gnd)
+9 (Fire2)       7 (D5)
+===========    =============