According to Dear Old Google, who incidentally isn't always right.
Quote
"What is the difference between country fried steak and chicken fried steak?
The other distinction that sometimes comes up is that, where country-fried steak is flour-dusted and usually served with brown gravy and onions, chicken-fried steak is breaded with eggs and served with cream gravy."
I was always told that it was called chicken fried steak because the breading is reminiscent of the breading used to fry chicken.