ft232 usb-serial adapter not recognized on boot

[bob prohaska]

A Pi2 running FreeBSD 12.1-STABLE (GENERIC) #5 r356208 doesn't seem
to see an FT232 usb-serial adapter, but does see it on disconnect/
reconnect. Once recognized it seems to work correctly. 

Boot messages are normal, except for:

(probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 00 00 00 24 00 
(probe0:umass-sim0:0:0:0): CAM status: CCB request completed with an error
(probe0:umass-sim0:0:0:0): Retrying command, 3 more tries remain
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM

There aren't any other reported errors during boot, and everything
appears normal once the ft232 is recognized. The behavior appeared
in the last couple of weeks.

Thanks for reading, and any ideas....

bob prohaska