ARM: dts: Enable out of band remote wakeup support on apq8084

Add device tree configuration data and wakeup gpio mux
configuration to enable out of band remote wakeup support
by default on apq8084 target.

Change-Id: If71d8ba0287faa6d8334e0c01fa0f8a92a422709
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>