coresight: fixing compilation warnings picked up by 64bit compiler

Compiling coresight drivers with a 64-bit compiler highlights a couple
of formatting issues, which are fixed by this patch.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 72f641fe6818a403aed52fb3a5b8a241ff76c24f)
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>