net/fsl: constify of_device_id array

of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/freescale/fec_mpc52xx.c
Simple merge

diff --cc drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
Simple merge

diff --cc drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
Simple merge

diff --cc drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
Simple merge

diff --cc drivers/net/ethernet/freescale/fs_enet/mii-fec.c
Simple merge

diff --cc drivers/net/ethernet/freescale/fsl_pq_mdio.c
Simple merge

diff --cc drivers/net/ethernet/freescale/gianfar.c
Simple merge

diff --cc drivers/net/ethernet/freescale/gianfar_ptp.c
Simple merge

diff --cc drivers/net/ethernet/freescale/ucc_geth.c
Simple merge

diff --cc drivers/net/ethernet/freescale/xgmac_mdio.c
Simple merge