ethdev: fix a typo
ethdev: fix a typo

This patch fixes a trivial typo in rte_ethdev.h; it should be
"RX multicast OFF" and not "RX multicast OF".

Signed-off-by: Rami Rosen <7f5a0f674127d5d5a91ecfe3b41be456d732af3d@intel.com>
Acked-by: Harry van Haaren <b9ad04ed670c22cfa7f5f9ab17e311ca85d11a76@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk