ARM: dts: msm: Fix eMMC high voltage corner wake up

eMMC is waking up in turbo voltage corner due to high bus voting.
Reduced vote to NOM only for 400MBps bus voting.

Change-Id: I5972479ed17b0e34da671e6c149d1e644db40426
Signed-off-by: Ram Prakash Gupta <rampraka@codeaurora.org>