ARM: dts: msm: update vote on ldo11 for amoled panel on sdm630

On sdm630, amoled panel needs VDDIO needs 1.8V on ldo11 and not
1.88V. Update the vote on ldo11 from 1.88V to 1.8V.

Change-Id: Ic6e6eae1a7c616236b2ba39b42c5f5b797b4d42c
Signed-off-by: Ashish Garg <ashigarg@codeaurora.org>