locking/qspinlock: Move pv_ops into x86 directory

The pv_ops belongs to x86 custom infrastructure and cleans up the
cna_configure_spin_lock_slowpath() with standard code. This is
preparation for riscv support CNA qspoinlock.

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