Electrical Engineering student can surely specialize in Computer science. There is nothing to worry about if you have ability to work hard. Since both of these programs are technical, they have something in common. Whether you can coup those who have base as CSE or not depends on yourself. It all depends on how hard can you work and how confident you are. Remember, the most important part is - you have knowledge as Electrical Engineer and if you do Computer science you may be able merge two different ideas for new innovations. You said you have knowledge in three of four Computer science subjects then there isn’t anything to worry about.

Finally, it will be better to leave your major only if you really aren’t interest in continuing it. I think both of these majors have equal prospects and it will be even easier for you to deal with your own major because you’ve already understood its pattern.