ARM: dts: msm: Add EUD extcon handler with USB primary on SDM855

USB driver needs to get EUD device based spoof connect and disconnect
notification from EUD driver. Hence add EUD extcon handler with USB
primary device node on SDM855.

Change-Id: I49be2a58063760f7ae316c91f310cbfc6ce38e23
Signed-off-by: Mayank Rana <mrana@codeaurora.org>