ixgbe: fix array overflow in vector Rx
ixgbe: fix array overflow in vector Rx

Switch the order of the conditions in a while loop, so we check the
range of "i" against the max, before using it to index into the array.

Signed-off-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>

venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,mixja/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,tsphillips/dpdk-fork,venkynv/dpdk-mirror,msune/dpdk,msune/dpdk,mixja/dpdk,venkynv/dpdk-mirror,tsphillips/dpdk-fork,msune/dpdk