ARM64: dts: amlogic: Clean up Vega S95 /memory nodes

Resolve the following warnings from new dtc by adding the unit address:

    DTC     arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95-pro.dtb
  Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
    DTC     arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95-meta.dtb
  Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
    DTC     arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95-telos.dtb
  Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name

Fixes: cc733bc9 ("ARM64: dts: amlogic: Add Tronsmart Vega S95 configs")
Signed-off-by: Andreas Färber <afaerber@suse.de>