coresight: fix typo in of_coresight.c

fixes obvious typo in of_coresight.c
%s/non-configuable/non-configurable

Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>