x86/paravirt: Convert natively patched pv ops to use paravirt alternatives

Now that the paravirt alternatives infrastructure is in place, use it
for all natively patched pv ops.

This fixes KASAN warnings in the ORC unwinder like the following:

  BUG: KASAN: stack-out-of-bounds in deref_stack_reg+0x123/0x140

This also improves debuggability by making vmlinux more likely to match
reality.

Reported-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2 files changed