gianfar: Fix regression caused by new napi interface

Protect all new napi function calls with CONFIG_GFAR_NAPI.  Otherwise
the driver will stop working when CONFIG_GFAR_NAPI disabled.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1 file changed