arm/dt: mpq8092: add/fix the regulator nodes

1. add all missing regulator nodes
2. fix the voltages, source, default-ON based on
the latest mpq8092 power grid.

Change-Id: Ied53f8fee763b0958c94073707b590615f8b57cc
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>