ARM: OMAP4470: VP: set recommended VP registers settings

Operating Conditions Data Manual Addendum
Revision 0.7 (October 2012).

Set recommended register settings in voltage processor.

Change-Id: I38e7d0e51247ed6027274cd1d6a14d616778d020
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>