arm64: dts: renesas: rzg3s-smarc-som: Fix Ethernet aliases

arm64: dts: renesas: rzg3s-smarc-som: Fix Ethernet aliases

Fix typos in the Ethernet aliases.  U-Boot uses the ethernetX (X={0, 1,
..., N}) aliases to update the DTB with the MAC addresses.  The
ethernetX or ethX aliases are not used by the Linux RAVB driver.

Fixes: 932ff0c802c6 ("arm64: dts: renesas: rzg3s-smarc-som: Enable the Ethernet interfaces")
Suggested-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240328065738.3049316-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>