ARM: dts: msm: Add EUD device node for sdmmagpie

The EUD (Embedded USB Debugger) is a mini-USB hub implemented
on chip to support the USB-based debug and trace capabilities.
Add device tree node to support EUD on sdmmagpie based platforms.

Change-Id: I6573b4064410ba9d0669976eaa8012116ce3ab04
Signed-off-by: Prateek Sood <prsood@codeaurora.org>