imx8mn-var-som: read eth MAC address from EEPROM

Read ethernet MAC address from EEPROM located on the SOM.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index a940d8a..67db3e4 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -248,6 +248,7 @@
 	select MISC
 	select I2C_EEPROM
 	select DM_ETH_PHY
+	select NVMEM
 
 config TARGET_KONTRON_PITX_IMX8M
 	bool "Support Kontron pITX-imx8m"