arm: boot: update old ARM ID

Quoted 1 line

From Steve Muckle's original patch,

The mask and ID pattern for older ARM IDs in the kernel decompressor matches the CPU ID for Scorpion, causing the v7 caching routines not to be run and kernel decompression to take significantly longer.

Quoted 6 lines · Daniel Walker

Quoted 1 line

From Steve Muckle's original patch,

The mask and ID pattern for older ARM IDs in the kernel decompressor matches the CPU ID for Scorpion, causing the v7 caching routines not to be run and kernel decompression to take significantly longer.

This pathc is actually only half the job - there's other stuff in the kernel which would need updating in the same way. I have a fuller patch for this which I'll be queuing up for the next merge window later today.