Formatting: Import crates directly

src/arch/x86_64/kernel/acpi.rs

src/arch/x86_64/kernel/apic.rs

src/arch/x86_64/kernel/gdt.rs

src/arch/x86_64/kernel/idt.rs

src/arch/x86_64/kernel/irq.rs

src/arch/x86_64/kernel/pci.rs

src/arch/x86_64/kernel/percore.rs

src/arch/x86_64/kernel/pic.rs

src/arch/x86_64/kernel/pit.rs

src/arch/x86_64/kernel/processor.rs

src/arch/x86_64/kernel/serial.rs

src/arch/x86_64/kernel/vga.rs

src/drivers/net/rtl8139.rs

src/lib.rs