ARM: dts: msm: Change eMMC slave id for sdm670 bus voting

Added the correct id for eMMC slave node, in the CPU to eMMC-config bus
voting path.

Change-Id: I58e432cfcb84fd24e83fcd632eb8498c7ac361ef
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>