net/ixgbe/base: configure DMA coalescing for 10Mb
net/ixgbe/base: configure DMA coalescing for 10Mb

Provide a DMA coalescing configuration for 10Mb link speed.

Signed-off-by: Xiao Wang <28aecb4e45c1566b6185c24680691da84bd4fcf8@intel.com>
Acked-by: Wenzhuo Lu <58cb9036bdff9a5412edc3b9f70e105ccf59954f@intel.com>

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