Boot issue with orange pi pc

[Alexander Mishin]

After a last friday's update my OrangePI-PC stop booting.
Where to look? Fdt overlay to set the clock for mmc0?

Here's how it ended in the console:

---- skipped ----
Trying to mount root from ufs:/dev/ufs/rootfs [rw,noatime]...
uhub4 on usbus5
uhub5 on usbus1
uhub4: <Generic OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on 
usbus5
uhub5: <Generic OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on 
usbus1
Root mount waiting for:ugen6.1: <Generic EHCI root HUB> at usbus6
ugen7.1: <Generic OHCI root HUB> at usbus7
uhub6 usbus0 on usbus6
  usbus1uhub7 usbus2 on usbus7
  usbus3uhub6: <Generic EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> 
on usbus6
  usbus4uhub7: <Generic OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> 
on usbus7
  usbus5 usbus6 usbus7
uhub0: 1 port with 1 removable, self powered
uhub4: 1 port with 1 removable, self powered
uhub5: 1 port with 1 removable, self powered
uhub7: 1 port with 1 removable, self powered
mmc0: <MMC/SD bus> on aw_mmc0
Cannot set frequency for clk: mmc0, error: 34
aw_mmc0: failed to set frequency to 50000000 Hz: 34
uhub2: 1 port with 1 removable, self powered
uhub1: 1 port with 1 removable, self powered
uhub3: 1 port with 1 removable, self powered
uhub6: 1 port with 1 removable, self powered
mountroot: waiting for device /dev/ufs/rootfs...
Mounting from ufs:/dev/ufs/rootfs failed with error 19.

Loader variables:
   vfs.root.mountfrom=ufs:/dev/ufs/rootfs
   vfs.root.mountfrom.options=rw,noatime

Manual root filesystem specification:
   <fstype>:<device> [options]
       Mount <device> using filesystem <fstype>
       and with the specified (optional) option list.

     eg. ufs:/dev/da0s1a
         zfs:zroot/ROOT/default
         cd9660:/dev/cd0 ro
           (which is equivalent to: mount -t cd9660 -o ro /dev/cd0 /)

   ?               List valid disk boot devices
   .               Yield 1 second (for background tasks)
   <empty line>    Abort manual input

mountroot> aw_mmc0: controller timeout
aw_mmc0: timeout resetting DMA/FIFO
aw_mmc0: timeout updating clock
aw_mmc0: controller timeout
aw_mmc0: timeout resetting DMA/FIFO
aw_mmc0: timeout updating clock
aw_mmc0: controller timeout
aw_mmc0: timeout resetting DMA/FIFO