add pll configuration and tx reset

add the reset b2l function and pll configuration to regconfig.cpp, added the status of PLL to statlink.cpp

I will fix the conflict first

I fixed the conflict part. Actually this part is no more need. I will remove this part after this merge pull request.

By robbep (robbe@lal.in2p3.fr)

Are you sure this does what you want ? The function returns a frequency, not a status

Are you sure this does what you want ? The function returns a frequency, not ...

Originally, I want to show the overall lock status. I pickup wrong function, I changed it with new commit.