enetc: Fix endianness issues for enetc_ethtool

These particular fields are specified in the H/W reference
manual as having network byte order format, so enforce big
endian annotation for them and clear the related sparse
warnings in the process.
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/freescale/enetc/enetc_hw.h

@@ -575,10 +575,10 @@ struct enetc_cmd_rfse {
 	u8 smac_m[6];
 	u8 dmac_h[6];
 	u8 dmac_m[6];
-	u32 sip_h[4];
-	u32 sip_m[4];
-	u32 dip_h[4];
-	u32 dip_m[4];
+	__be32 sip_h[4];
+	__be32 sip_m[4];
+	__be32 dip_h[4];
+	__be32 dip_m[4];
 	u16 ethtype_h;
 	u16 ethtype_m;
 	u16 ethtype4_h;