sfc: Update copyright banners

Update the dates for files that have been added to in 2012-2013.
Drop the 'Solarstorm' brand name that's still lingering here.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

diff --cc drivers/net/ethernet/sfc/mdio_10g.c
Simple merge

diff --cc drivers/net/ethernet/sfc/mdio_10g.h
Simple merge

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

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

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

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

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

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

diff --cc drivers/net/ethernet/sfc/qt202x_phy.c
Simple merge

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

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

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

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

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

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

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

diff --cc drivers/net/ethernet/sfc/txc43128_phy.c
Simple merge

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

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