ARM: dts: msm: update stub regulator devices for msmcobalt

An updated power grid shows changes to min/max voltage settings,
and addition/removal of some regulators.

Update the stub regulators to reflect these changes.

Change-Id: I4d1bd1249fff4a53891eb8f2cdc79aeddb1cac7f
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>