I know Saint Peter won't call my name
This refers to the popular tradition of Saint Peter guarding the gates of Heaven. He is often depicted in art as holding the keys to the Kingdom of Heaven per the Petrine doctrine. He is also commonly depicted with the book of life reading off the names of those individuals who had believed in Jesus Christ.
Thus narrator is not going to heaven — Saint Peter won’t be calling his name to enter heaven.
To help improve the meaning of these lyrics, visit “Viva la Vida” by Coldplay Lyrics and leave a comment on the lyrics box