I would get all the sleep he needs in at whatever times he needs it. Also, if he is an early riser, and/or a short napper, then an early bedtime is necessary and perfectly normal. Just for thoughts, my dd is almost 15 mos old, she has and this is her routine:
8:00 wake
10:30-12:15 nap
4-5:30 nap
8:00 bed
So, you see her A times are only 2.5, 3.75, and 2.5. Of course, her naps have changed up and down alot over the last several months, but right now she's in a "nap alot" phase, and I'm going with it. Sometimes she'll go through a phase of not really napping in the evening, but she still gets rest time and goes to bed at 8 always.