Bug#981005: linux-image-5.10.0-2-amd64: Bluetooth stopped working

[Pelle <pelle@riseup.net>]

Relevant part of 5.10.0 dmesg:

   [20164.000149] ata1.00: configured for UDMA/100
   [20164.084110] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
   [20164.167454] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
   [20164.188123] usb 4-4: new full-speed USB device number 8 using ohci-pci
   [20164.382093] usb 4-4: New USB device found, idVendor=0930, idProduct=0220, bcdDevice= 0.01
   [20164.382103] usb 4-4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
   [20164.390243] usb 4-4: firmware: direct-loading firmware ar3k/AthrBT_0x31010000.dfu
   [20164.429414] PM: suspend exit
   [20164.455974] usb 4-4: firmware: direct-loading firmware ar3k/ramps_0x31010000_40.dfu
   [20164.466587] usb 4-4: USB disconnect, device number 8
   [20165.036680] usb 4-4: new full-speed USB device number 9 using ohci-pci
   [20167.982738] wlp5s0: authenticate with 74:da:88:a9:c6:a6
   [20168.014007] wlp5s0: send auth to 74:da:88:a9:c6:a6 (try 1/3)
   [20168.017540] wlp5s0: authenticated
   [20168.028507] wlp5s0: associate with 74:da:88:a9:c6:a6 (try 1/3)
   [20168.037597] wlp5s0: RX AssocResp from 74:da:88:a9:c6:a6 (capab=0x411 status=0 aid=2)
   [20168.037768] wlp5s0: associated
   [20168.054940] IPv6: ADDRCONF(NETDEV_CHANGE): wlp5s0: link becomes ready
   [20170.260959] usb 4-4: New USB device found, idVendor=0930, idProduct=0220, bcdDevice= 0.02
   [20170.260970] usb 4-4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
   [20170.264703] Bluetooth: hci0: don't support firmware rome 0x31010000
   [20171.105831] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
   [20171.117913] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
   [20171.802265] wlp5s0: AP 74:da:88:a9:c6:a6 changed bandwidth, new config is 2417.000 MHz, width 1 (2417.000/0 MHz)