ARM: dts: bcm2835: add index to the ethernet alias

ARM: dts: bcm2835: add index to the ethernet alias

[ Upstream commit 10b6c0c2e2bb8cd1be682f8d36ef597e3419cb88 ]

An alias name should have an index number even when it is the only of its type.
This allows U-Boot to add the local-mac-address property. Otherwise U-Boot
skips the alias.

Fixes: 6a93792774 ("ARM: bcm2835: dt: Add the ethernet to the device trees")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>