ARM: dts: msm: Split qcom,msm-id for 8610

Update the MSM8610 device tree files to reflect the new
format of the qcom,msm-id property, where qcom,msm-id
describes the SoC version and qcom,board-id describes the
platform type and subvariant, rather than grouping these
attributes into a single property.

Change-Id: I43acc5a5cc70c1b9497c6697f8e08dfceabe0be4
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>