Combine first 4 ingredients in a large zip-top plastic bag. Add 1 teaspoon salt and pork to bag; seal and shake well. Marinate in refrigerator 2 hours, turning bag occasionally.
Remove pork from bag; discard marinade. Sprinkle pork evenly with remaining 1 teaspoon salt. Place pork on grill rack coated with cooking spray; grill 20 minutes or until a thermometer registers 160° (slightly pink). Let stand 10 minutes before slicing thinly.