ARM: dts: msm: Add support for PRNG TPDM on SDM670

Add device tree support for PRNG TPDM on SDM670. The
device will be used to capture debug information from
PRNG module.

Change-Id: Id252a10ef4e24e627b11205bf433e44c8a47aecd
Signed-off-by: Saranya Chidura <schidura@codeaurora.org>