How can we make the lantiq xrx200 devices faster

[Plonk34]

Have someone took a look into the u-boot code if we cant use upstream u-boot code and overclock the CPU speed? I dont see any reports or requests in the forum here about overclocking capabilities from the xrx200 devices. Would be nice to know how far they could go without the need of increasing the voltage.

It is possible to change these settings in uboot for Easybox 904xDSL but i think it is not the problem in commercial products like Speedports or AVM get speeds up to 100Mb/s and VMMC, without that.