bootloader: Add tracing to malloc_large()
bootloader: ARM: Fix mmu_free()

Allocation size was mixed up with page counts...
Allow freeing up to sNextVirtualAddress.
bootloader: ARM: Replace KERNEL_BASE with KERNEL_LOAD_BASE
bootloader: M68K: s/KERNEL_BASE/KERNEL_LOAD_BASE/
bootloader: M68K: Fix mmu_free()

Same bug as in ARM code...
Fix comments