Remove linux/reboot.h

* linux/reboot.h: Remove.
* Makefile.am (EXTRA_DIST): Remove it.
* reboot.c: Do not include <linux/reboot.h>.
* xlat/bootflags1.in: Add default values.
* xlat/bootflags2.in: Likewise.
* xlat/bootflags3.in: Likewise.
6 files changed