Add missing ARM-Cortex uarchs

[tonybaloney]

Added detection for Cortex-A720, Cortex-X4, Cortex-X925, and Cortex-A725

[fbarchard]

Looks good. Consider adding the A515 and A520, but it can be in a followup.

[tonybaloney]

I'll have to get the datasheets for those and raise in another PR

[fbarchard]

Needs another reviewer to land.
X925 is hard to find. It was in Exynos 2500 and Mediatek 9400
Exynos 2500 is in Galaxy Z Flip 7 and Galaxy Tab S11
Mediatek 9400 is in Vivo X200

While looking I see theres a Cortex A320 for even lower end.

Some of the phones have 4 uarch - eg Samsung S23:
Octa-core (1x3.36 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510)
The detect isnt working on those 2 medium cores
The A710 is the only uarch that supports 32 bit, so ideally the detection would somehow reflect that the other 6 are disabled