EBCDIC is a character encoding, like ASCII or UTF-8. If you have XML encoded with EBCDIC, and want to convert that to XML encoded with ASCII/UTF-8, then it depends on how you're obtaining the data.
If you're getting it as the payload in an IBM MQ message then there are a few things built into the IBM MQ Native protocol that can decode EBCDIC for you.
If you're using another protocol or doing something else entirely then I don't think there is anything built in to help you. You can write a script to do the conversion, but the details depend on exactly what you're doing.
If you have something that is *not* XML, encoded with EBCDIC, then converting that to XML depends more on the actual format of your data than on the character encoding being used.