coresight-etm4x: Controls pertaining to the context ID functions

Adding sysfs entries to access and configure specifics about the
context ID comparator functions.

Change-Id: I3ae50dde4eafdba13273b03b5de4ee8ac558a65b
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: 4a584be1d0061f7992a661f7c1a20c8688a50a19
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


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