net/bnxt: fix buffer allocation reattempt

net/bnxt: fix buffer allocation reattempt

In case of a buffer allocation failure, we reattempt buffer allocation
before the Rx handler exits. We were not attempting this when producer
index is greater than the number of buffers to allocate. Fixed it with
correct checks.

Fixes: d9dd0b29ed31 ("net/bnxt: fix Rx handling and buffer allocation logic")
Cc: stable@dpdk.org
Signed-off-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>