linux-wandboard

svcrpc: copy cb reply instead of pages

It's much simpler just to copy the cb reply data than to play tricks
with pages.  Callback replies will typically be very small (at least
until we implement cb_getattr, in which case files with very long ACLs
could pose a problem), so there's no loss in efficiency.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>