This was briefly mentioned in the last stream. In Solo you would have to split your time between driving the SRV and flying your ship in. Not exactly the most convenient way to do things but there you go.
But there aren't going to be any other SRVs around in Solo, nor other ships engaged in combat. In Solo - I assume! - it would just be 'you' attacking the base on your own, possibly with NPC skimmers attacking you.