Turn MCX series into families.
Reasoning:
1. The MCX SOCs are quite different from each other and having them all
under one family in the HWMv2 hierarchy is fruitless because there
are so many differences that it is confusing to try to introduce
family-level code and configs since they would each only apply to a
subset of the series. There is almost nothing that can be shared
between all of them. Which is why there are comments in the MCX
family files saying not to put anything in them. This is a technical
waste.
2. Therefore, turning all of them into families is almost 0 effort and
makes sense. It will allow these different types of MCX to be
further subdivided into series in the future as the MCX portfolio
expands and such division will be necessary as new SOCs within each
letter family are released.
Signed-off-by: Declan Snyder <declan.snyder@nxp.com>
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