To answer your question: no, you do not need a photography degree to pursue photojournalism. And, I believe the course of study you have mentioned will serve you well as you follow your passion. Definitely study photography, both still and video, as you will need to demonstrate your skills in these areas.
I noticed in some of the other answers, the authors suggested: maybe you do not need a college education and photojournalism is a dying profession. I do not agree with either of those opinions. Getting an education is not a waste of time nor money. It exposes you to ideas and experiences which are invaluable in life. I agree earning a living in the arts is not easy. But, if you have the determination and skills to succeed you should be able to make a living. I suggest you take a marketing class because if you end up freelancing you will need that information. Freelancers, in general, only spend 20% of their time with a camera and 80% marketing themselves as they seek assignments.
I hope this helps you and I wish you the best as you follow your dream.