Thematically, it wouldn't make sense to me. You wouldn't be an unawakened person, it'd imply you were an adept or magician and then just totally ignored it in favor of being a rigger, and then lost it when you got your rig installed. It's not really a thing, from what I can tell, for someone to have access to magic but just as a little tiny side thing they don't really care about. Magic is often the equivalent of that person's religion, after all. Sometimes literally their religion (shamanism, shinto, christian theurgy) While not impossible, if I was GM, I'd make sure you had a real and indepth backstory explaining what lead up to that.
Mechanically, summoning wouldn't be worth it. A Force 1 or 2 spirit can't do shit. A point or two of Adept powers might work, but then you'd also lose them if you ever bought more 'ware, and there's always more 'ware a character can have. Unless you are waiting to upgrade all your cyber to alpha or better before buying more.
What Csjarrat suggested is probably a different character concept than what you'd want, but it does work. An adept can be absolutely beast at AR driving and gunnery. You don't even need a rig since you can do your best work in AR.