wood <lrg@slimlogic.co.uk> 1311844849 +0100

regulator: Bootstrap wm831x DVS VSEL value from ON VSEL if not already set

If we don't have a DVS VSEL value already set when we start up then start
it off with the value currently being used for ON.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
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