Find out why initial_memory_size is not correct

[ultimaweapon]

The following logs came from 8GB RAM:

[I]: Initial memory size: 8587370496 (8.59 GB)
     Boot area          : 0x280
     kernel/src/main.rs:95

[ultimaweapon]

This seems like a correct value since on the PS4 it is 8571355136.