readme: Fix Nordic's company name
timer: Fix formatting
timer: Add inline functions us2ticks() and ticks2us()
ll: Create structure to wrap advertising reports
ll: Add ll_plat_init() and ll_plat_send_adv_report() APIs
nrf51822/ll-plat: Initial implementation of ll_plat APIs
ll: Initialize LL platform specific code
ll: Send adv report via ll_plat_send_adv_report()