get_cpu_freq
freq = (get_cpu_freq(cpu) + 500000) / 1000000;
uint_t get_cpu_freq(Prom_node *);
freq = HZ_TO_MHZ(get_cpu_freq(cpu));
freq = DAK_CLK_FREQ_TO_MHZ(get_cpu_freq(cpu));
freq = LNECK_CLK_FREQ_TO_MHZ(get_cpu_freq(cpu));
freq = (HZ_TO_MHZ(get_cpu_freq(pnode->child)));
freq = SG_CLK_FREQ_TO_MHZ(get_cpu_freq(cpu));