arm64: dts: marvell: Drop undocumented SATA phy names

While "phy-names" is allowed for sata-port nodes, the names used aren't
documented and are incorrect ("sata-phy" is what's documented). The name
for a single entry is fairly useless, so just drop the property.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>