Oct 5 (Reuters) - PepsiCo Inc raised its full-year revenue forecast on Tuesday, as the easing of pandemic restrictions boosts demand for sodas at theaters and restaurants. The company said it was expecting fiscal 2021 organic revenue to rise about 8%, compared with its prior forecast of a 6% increase. (Reporting by Uday Sampath in Bengaluru; Editing by Anil D’Silva)