gianfar: Use mpc85xx support for errata detection
Use the macros and defines from mpc85xx.h to simplify and prevent errors in identifying a mpc85xx based SoC for errata detection. This should help enabling (and identifying) workarounds for various mpc85xx based chips and revisions. For instance, express MPC8548 Rev.2 as: (SVR_SOC_VER(svr) == SVR_8548) && (SVR_REV(svr) == 0x20) instead of: (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020) Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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