ARM: dts: msm: correct vote on ldo11 for vddio on sdm660

On sdm660, VDDIO needs 1.8V and LDO11 is voted for 1.88V
which is causing higher power numbers. Update the vote
correctly for LDO11.

Change-Id: Id6178d312394a4c4bebb77659f6eb7e21574137b
Signed-off-by: Ashish Garg <ashigarg@codeaurora.org>