x86, 32-bit: Convert sys_vm86 & sys_vm86old

Convert these to new PTREGSCALL stubs.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260403316-5679-6-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>