net/sfc/base: provide a flag for controlling CTPIO mode
net/sfc/base: provide a flag for controlling CTPIO mode

Either cut-through or store-and-forward mode.

Signed-off-by: Guido Barzini <017729f88a2b87bdde67d72bca319e317eda6fbc@solarflare.com>
Signed-off-by: Andrew Rybchenko <ac94ab2a8fe9a9a087f6e24dcbc16626b52c07e8@solarflare.com>

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