sched: Move SCHED_LOAD_SHIFT macros to kernel/sched/sched.h

They are used internally only.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5135A771.4070104@huawei.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>