All of the code in this commit is:

 a) Obsolete and intended to work with a driver that has never been
    submitted upstream anywhere and is no longer used

 b) Superceeded by the DT code in Linux DT tree

Remove it all and rely on Linux DTS files to properly specify RAVE SP
MFD with a watchdog child node.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>