I did a mistake and set the kernel_physical_base value to be just on
the actual linked kernel ELF start offset, while this value should
represent together with KERNEL_MAPPING_BASE the actual higher-half load
address.
By changing this value, we resolve a bug in which disabling KASLR
doesn't work and will cause the prekernel to hang on this statement:
```c++
VERIFY(kernel_load_base >= kernel_mapping_base + 0x200000);
```