csky: Enable ARCH_INLINE_READ*/WRITE*/SPIN*

Enable ARCH_INLINE_READ*/WRITE*/SPIN* when !PREEMPTION, it is copied
from arch/arm64. It could reduce procedure calls and improves
performance.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>