ARM: msm: dts: Set usb dvdd voltage range to [0.8v 0.8v] for sdm429

Currently usb dvdd voltage is set to [928000 928000] for sdm429. This is
leading to driver probe failure due different client vote for 0.8v. Hence
fix the issue by setting voltage range for DVDD to [800000 800000] for
sdm429 to avoid probe failure.

Change-Id: If0abba01bf1623f5706d0fd2ae3283dd82d65b57
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>