uboot: add gunzip syscall

and reformat some uboot files with indent
loader: android: extract ramdisk before booting

this is the first step fore ramdisk patching to support multiboot
Revert "uboot: add gunzip syscall"

This reverts commit d52a8a4771a613b952042de4da8c27fdcd29f824.
uboot: don't enable MMU because we rely on LK's initialization
add cpio library