ARM: dts: msm: add SWAO TGU support on sdm670

Add device tree support for SWAO TGU on SDM670.The
device is used to detect patterns or sequences
on a given set of signals.

Change-Id: Ifc0ed60b5168c340f31d7c412627384d34c98687
Signed-off-by: Saranya Chidura <schidura@codeaurora.org>