net/bnxt: fix Rx interrupt vector

net/bnxt: fix Rx interrupt vector

The receive interrupt vector should be offset by the constant
RTE_INTR_VEC_RXTX_OFFSET; otherwise setting up some queue interrupts
will fail.

Fixes: 1fe427fd08ee ("net/bnxt: support enable/disable interrupt")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Tested-by: Rahul Gupta <rahul.gupta@broadcom.com>