ARM: imx: Add missing FEC ethernet quirk for MX8M

The MX8M also contains a gigabit MAC, so define FEC_QUIRK_ENET_MAC.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/arch/arm/include/asm/arch-imx8m/imx-regs.h b/arch/arm/include/asm/arch-imx8m/imx-regs.h
index f571115..3f50014 100644
--- a/arch/arm/include/asm/arch-imx8m/imx-regs.h
+++ b/arch/arm/include/asm/arch-imx8m/imx-regs.h
@@ -63,6 +63,7 @@
 #define DDR_CSD1_BASE_ADDR	0x40000000
 
 #define IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_MASK 0x70000
+#define FEC_QUIRK_ENET_MAC
 
 #if !defined(__ASSEMBLY__)
 #include <asm/types.h>