This is the intro for how Robbie plays it in the Last Waltz:

E--3------0--3-3----|
B--3--/3--1--3-3----|
G--0------0--4-4----|
D--0--/3--2--5-5----|
A--2------3---------|
E--3----------------|

He also throws a variation like this in:

E--3------0------3--|
B--3--/3--1------3--|
G--0------0--3h4----|
D--0--/3--2---------|
A--2------3---------|
E--3----------------|