[media] doc-rst: add davinci-vpbe documentation

Convert it to rst format and add it to the v4l-drivers book.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/v4l-drivers/davinci-vpbe.rst

+The VPBE V4L2 driver design
+===========================
 
-                VPBE V4L2 driver design
- ======================================================================
+File partitioning
+-----------------
 
- File partitioning
- -----------------
  V4L2 display device driver
          drivers/media/platform/davinci/vpbe_display.c
          drivers/media/platform/davinci/vpbe_display.h
@@ -22,11 +22,11 @@
          drivers/media/platform/davinci/vpbe_osd.h
          drivers/media/platform/davinci/vpbe_osd_regs.h
 
- Functional partitioning
- -----------------------
+Functional partitioning
+-----------------------
 
- Consists of the following (in the same order as the list under file
- partitioning):-
+Consists of the following (in the same order as the list under file
+partitioning):
 
  1. V4L2 display driver
     Implements creation of video2 and video3 device nodes and
@@ -74,20 +74,22 @@
     features. The VPBE module interacts with the OSD for enabling and
     disabling appropriate features of the OSD.
 
- Current status:-
+Current status
+--------------
 
- A fully functional working version of the V4L2 driver is available. This
- driver has been tested with NTSC and PAL standards and buffer streaming.
+A fully functional working version of the V4L2 driver is available. This
+driver has been tested with NTSC and PAL standards and buffer streaming.
 
- Following are TBDs.
+To be done
+----------
 
- vpbe display controller
+vpbe display controller
     - Add support for external encoders.
     - add support for selecting external encoder as default at probe time.
 
- vpbe venc sub device
+vpbe venc sub device
     - add timings for supporting ths8200
     - add support for LogicPD LCD.
 
- FB drivers
+FB drivers
     - Add support for fbdev drivers.- Ready and part of subsequent patches.

Documentation/media/v4l-drivers/index.rst

@@ -24,4 +24,5 @@ License".
 	cpia2
 	cx18
 	cx88
+	davinci-vpbe
 	zr364xx