msm: rtb: Add support for device tree

Add support for setting up RTB via matching in the device tree
in addition to the platform_data driven model. Also add
the corresponding device for 8974 in the device tree.

Change-Id: I76615fc75ff4fe428cab16a4aa161b032e548983
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
2 files changed