gianfar: Exclude PPC specific errata handling from ARM builds

This excludes the PPC specific instructions for PPC based SoC
(MPC85xx family) version identification from ARM builds.
The PPC specific macro mfspr() from asm/reg.h is not defined
by the ARM architecture.

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index a488105..37e0604 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -88,8 +88,10 @@
 #include <linux/net_tstamp.h>
 
 #include <asm/io.h>
+#ifdef CONFIG_PPC
 #include <asm/reg.h>
 #include <asm/mpc85xx.h>
+#endif
 #include <asm/irq.h>
 #include <asm/uaccess.h>
 #include <linux/module.h>
@@ -1063,6 +1065,7 @@
 	}
 }
 
+#ifdef CONFIG_PPC
 static void __gfar_detect_errata_83xx(struct gfar_private *priv)
 {
 	unsigned int pvr = mfspr(SPRN_PVR);
@@ -1095,6 +1098,7 @@
 	    ((SVR_SOC_VER(svr) == SVR_P2010) && (SVR_REV(svr) < 0x20)))
 		priv->errata |= GFAR_ERRATA_76; /* aka eTSEC 20 */
 }
+#endif
 
 static void gfar_detect_errata(struct gfar_private *priv)
 {
@@ -1103,10 +1107,12 @@
 	/* no plans to fix */
 	priv->errata |= GFAR_ERRATA_A002;
 
+#ifdef CONFIG_PPC
 	if (pvr_version_is(PVR_VER_E500V1) || pvr_version_is(PVR_VER_E500V2))
 		__gfar_detect_errata_85xx(priv);
 	else /* non-mpc85xx parts, i.e. e300 core based */
 		__gfar_detect_errata_83xx(priv);
+#endif
 
 	if (priv->errata)
 		dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",