ppc64le: ReaR ISO fails to boot, kernel panics

Issue

• When booting the ReaR ISO on PPC64le, the kernel panics after printing the following messages

  Raw

  [    0.164193] List of all partitions:
  [    0.164195] No filesystem could mount root, tried: 
  [    0.164195] 
  [    0.164198] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
  [...]
  

  Note above the line List of all partitions: which reports no partition was found at all.