[U-Boot] [PATCH 4/4 v4] Preventing needless switching on and off PLL bypass mode, allowing allow single-stepping through the SPL

[Robert Deliën]

> "The switch of CPU clock is to make our EVK board can boot up the
> uboot and kernel with less than 100mA power consumption to meet the
> USB specification

That's actually a very good point. For that scenario we may even consider
to use the SoC's internal 24MHz ring oscillator instead of the crystal.

But this also means that we should disable bypass mode either a whole lot
later, or make it depend on CONFIG_USB.