e_tag_ether_type has been wrongly defined as bool type which introduces
a bug for etag/etag_strip for x550 NIC. Fixes it by defining it as
uint16_t.
Fixes: ad43b7bce95b ("net/ixgbe: avoid multiple definitions of bool")
Cc: stable@dpdk.org
Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>