Mix spices and brown sugar and rub into both sides of pork chops. Set Instant Pot on saute (high) and add tablespoon butter. Once hot, add pork chops and brown on both sides for 1-2 minutes each. Remove pork chops and set aside. Press cancel. Add 1 cup chicken broth and use a wooden spoon to deglaze the bits off the bottom of the pot. Add Worcestershire sauce and liquid smoke and add pork chops directly to the pot in the liquid. Secure lid, make sure vent is set to “sealing†and pressure cook (manual) for 7 minutes. When done, allow pressure to naturally release for 12 minutes. After 12 minutes, quick release the rest, remove lid and pork chops. Let pork chops rest for about 5 minutes before serving.