arm64: dts: amlogic: meson-gxl-s905w-jethome-jethub-j80: fix invalid rtc node name

Fixes:
pcf8563@51: $nodename:0: 'pcf8563@51' does not match '^rtc(@.*|-[0-9a-f])*$'

Link: https://lore.kernel.org/r/20230124-b4-amlogic-bindings-fixups-v1-7-44351528957e@linaro.org


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>