sfc: Rename implementations in siena_sriov.c to have a 'siena' prefix

Patch in preparation for the upcoming EF10 sriov support.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/sfc/efx.c
Simple merge

diff --cc drivers/net/ethernet/sfc/farch.c
Simple merge

diff --cc drivers/net/ethernet/sfc/mcdi.c
Simple merge

diff --cc drivers/net/ethernet/sfc/nic.h
Simple merge

diff --cc drivers/net/ethernet/sfc/siena.c
Simple merge

diff --cc drivers/net/ethernet/sfc/siena_sriov.c
Simple merge