Comment 10 for bug 1941622

The change looks good, but since I'm not familiar with these u-boot parts, I'd like to know the following before proceeding:

1) I assume this is a runtime change that happens after updating the u-boot packages on an installed SiFive drive, right? Does the change happen instantly after upgrade of the package? Or on next reboot?
2) The test case is not too clear about how one checks if the patch is in effect or not. How can one confirm that the effective CPU clock speed is now different? Is it just a matter of `cat /proc/cpuinfo`?

Can you please update the description with these clarifications?