net/bnxt: fix registration of VF async event completion ring

While registering vf's event completion ring to FW, use the wrong
macro, FW doesn't set up the event completion ring successfully,
VF can't receive any async event.

Fixes: 4535cad39515 ("net/bnxt: handle VF/PF initialization appropriately")
Cc: stable@dpdk.org
Signed-off-by: Yongping Zhang <yongping.zhang@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>