rpi2: cpufreq(4) support lost ?

[Claude Buisson]

[I am not subscribed to this list - please answser to me]

I recently upgraded a RPI2 Model B, from head r323691 armv6 to head 
r325110 + patch D12907 (lib/libc/gen/tls.c) armv7.

In the dmesg, the lines:

bcm2835_cpufreq0: <CPU Frequency Control> on cpu0
bcm2835_cpufreq0: ARM 600MHz, Core 250MHz, SDRAM 400MHz, Turbo OFF

disappeared, and the log shows:

/etc/rc.d/powerd start
powerd: no cpufreq(4) support -- aborting: No such file or directory

As what seems to be a consequence, the system became much slower.

Everything came back to normal when I copied the old rpi2.dtb to the new 
/boot/msdos/

I tried the rpi2.dtb from the lastest snapshot
   FreeBSD-12.0-CURRENT-arm-armv7-RPI2-20171109-r325595.img
and cpufreq(4) disappeared again.

What I am missing ?

TIA

Claude Buisson