If I'm understanding, you start with a planet that's tidally-locked to its sun. The charged particles from the star impact one side of the planet over a couple billion years, causing the ferrous mantle and/or core materials to preferentially orient parallel, like creating a permanent magnet with an electromagnet.
Then, some cosmic event, like a moon impacting the planet, causes the planet to spin about 365 times faster along an axis roughly perpendicular to the north/south magnetic axis.
Then, the magnetic field pulls on the ferrous mantle bits, causing a form of plate tectonics over the next billion years while life is forming.
There are four problems with the scenario.
First, the sun releases both positive and negative particles, so the solar wind is electrically neutral. A positively-charged particle induces an inverted magnetic field, so the the solar wind is magnetically neutral as well. So you really can't "charge" a planetary magnet this way.
Second, as soon as the moon impacted the planet, it would likely turn much of the mantle into molten goo, which would reset the preferentially-aligned ferrous molecules (no more magnetic north/south). However, this isn't guaranteed. It's remotely plausible that solid chunks sort of floated around the underlying molten bits (like super-rapid tectonics), causing the unusual magnetic patterns in the first place (emphasis on "remotely").
Third, the odds of the moon impact causing the planet to start spinning really fast are vanishingly small. You'd likely still have a very slow-turning planet. I'm fairly confident that even if you could hit the planet hard enough and in the right place to add that kind of angular momentum, it would obliterate the planet (no more magnetic field after the planet re-formed from the molten debris).
Fourth, the magnetic fields aren't remotely strong enough to cause plate tectonics. If there was that much force, the iron would just rip through the ground and end up in one spot. Or, more likely, the charged and uncharged iron would end up scattering each other all over the planet, mostly neutralizing the magnetic field.
It's an interesting idea, but I don't think it's plausible at all.