ARM: dts: msm: Update regulator supply name for msm8610

There should not be underscore in the property name.
Remove the underdcore in the regulator supply name defined
in msm-thermal device tree.

Change-Id: I28cba3c8d581dd25cbdd9c2ff24fb917940ea349
Signed-off-by: Jennifer Liu <chihning@codeaurora.org>