Similar to DASD and QETH devices.

Example of kernel argument for 2 device paths:
zfcp=0.0.1905:0x50050763070845e3:0x4082400400000000,0.0.1945:0x50050763071845e3:0x4082400400000000

Each device path is separated by a comma (,). Adapter bus ID and WWPNs and
LUNs are separated by a colon (:).

Since Alpine has the advantage of using root=UUID= for root disk, device
order and device naming don't matter.