Adding support for Coresight debug bus to work with the GPU, including registering graphics core with Coresight and a coresight interface to GPU through sysfs. Change-Id: I9508659ca7d7d67e8a8becba41d06be76360c570 Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org> Signed-off-by: Carter Cooper <ccooper@codeaurora.org>