The CAPI controller operation reset_ctr is marked as optional, and
not all drivers do implement it. Add a check to the kernel CAPI
whether it exists before trying to call it.
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Acked-by: NKarsten Keil <isdn@linux-pingi.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>