doc: fix EF10 Rx mode name in sfc guide
doc: fix EF10 Rx mode name in sfc guide

Fixes: 390f9b8d82c9 ("net/sfc: support equal stride super-buffer Rx mode")
Cc: stable@dpdk.org

Signed-off-by: Andrew Rybchenko <ac94ab2a8fe9a9a087f6e24dcbc16626b52c07e8@solarflare.com>

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