rasd: Add the requested tracepoint to evlist

Look for the requested tracepoint from the name and
add it to the list of events to enable.

Signed-off-by: Jean Pihet <jean.pihet@linaro.org>
Link: http://lkml.kernel.org/r/1412933690-25576-3-git-send-email-jean.pihet@linaro.org
Signed-off-by: Borislav Petkov <bp@suse.de>