arm64: dts: imx93: add nvmem property for fec1

[ Upstream commit b2ab0eda ]

Add nvmem property for fec1 to get mac address.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Stable-dep-of: 109f256285dd ("arm64: dts: imx93: update default value for snps,clk-csr")
Signed-off-by: Sasha Levin <sashal@kernel.org>