save somewhat working 740 port

arch/sparc/Kconfig

arch/sparc/Makefile

arch/sparc/include/asm/irq.h

arch/sparc/include/asm/leon_reg.h

arch/sparc/include/asm/time.h

arch/sparc/kernel/bootmem.c

arch/sparc/kernel/clockevent.c

arch/sparc/kernel/irq.c

arch/sparc/kernel/setup.c

arch/sparc/kernel/time.c

init/main.c

kernel/kthread.c

kernel/sched/core.c

kernel/sched/edf.c

kernel/tick.c

lib/mm.c

lib/vsnprintf.c