coresight-etm4x: Controls pertaining to the selection of resources

Adding sysfs entries to control the selection of the resources the
trace unit will use as triggers to perform a trace run.

Change-Id: I61ed89e7e87b4b8dad5fa3d9adb9c1d0451864d6
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 6afa8a1387aa4af73e8c3b81019d958ef8a2a4d0
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Shashank Mittal <mittals@codeaurora.org>