satman main & si549: add WRPLL select_recovered_clock
satman main & si549: add helper si549 & interrupt setup
si549: add tag collector to process gtx & main tags
si549: add frequency counter to set BASE_ADPLL
si549: add set_adpll for main & helper PLL
si549: add main & helper PLL
IRQ & si549: add handler for gtx & main tags irq
IRQ: add docs for IRQ id