The code sets C_MASKINTS if that bit is not already set (correctly). Fix
the comment to agree.
Change-Id: If4543e2660a9fa2cdabb2d2698427a6c8d9a274c
Signed-off-by: Christopher Head <chead@zaber.com>
Reviewed-on: http://openocd.zylin.com/4620
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>