ARM: dts: msm: Use separate property for multiple WLAN support

qcom,converged-dt is meant to use one DT node which has multiple
sub-nodes to support multiple devices. For Lahaina it is a simple
scenario that the same DT node can be directly used by multiple
devices without creating sub-nodes. Use a separate DT entry
qcom,same-dt-multi-dev for such case to simplify implementation
and avoid conflicts.

Change-Id: If0dd195b8dd41eb4aa978bd86d690e6dbb18118d