coresight: adding comments to remove ambiguity

Add comment to function coresight_enable_path() to make
sure there is no misunderstanding about what the code does.

Change-Id: I4c4a286658551ab8d529d566bc2d6183e84d6e52
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 58b8d51b841eff6473df4d25959a2ec335b7cb85
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


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