vscsiif.h: replace PAGE_SIZE with VSCSIIF_PAGE_SIZE
Do not reference PAGE_SIZE directly: it could be undefined, or it could
have different values in the frontend or in the backend.
Define VSCSIIF_PAGE_SIZE as 4096, assuming all users of vscsiif.h have
4K page granularity. Replace PAGE_SIZE with VSCSIIF_PAGE_SIZE.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Release-acked-by: Wei Liu <wei.liu2@citrix.com>