Raspberry Pi 4 Model B Rev 1.1 not recognised

[voidbrain]

cat /proc/cpuinfo doesn't show me the Hardware entry or the microprocessor model. 'Raspberry Pi 4 Model B Rev 1.1' is readable on Model so it should be included to the PI_MODEL_NO array.

'BCM2711', // Raspberry Pi 4B
'Raspberry Pi 4 Model B Rev 1.1', // Raspberry Pi 4 Model B Rev 1.1
'BCM2712' // Raspberry Pi 5