net/enic: fix releasing mbufs when tearing down Rx queue
net/enic: fix releasing mbufs when tearing down Rx queue

When trying to release the mbufs, the function was incorrectly
iterating over the max size configured instead of the actual size
of the ring.

Fixes: 947d860c821f ("enic: improve Rx performance")

Signed-off-by: Nelson Escobar <921f6477015852c9d60fa5cb7e6a106f68b238db@cisco.com>
Reviewed-by: John Daley <097981eb5abe5dbeac3142a4f5a88742d916de86@cisco.com>

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