ARM: dts: aspeed: Cleanup lpc-ctrl and snoop regs

Fix the following warning:

    arch/arm/boot/dts/aspeed-g5.dtsi:409.27-414.8: Warning (unique_unit_address): /ahb/apb/lpc@1e789000/lpc-host@80/lpc-ctrl@0: duplicate unit-address (also used in node /ahb/apb/lpc@1e789000/lpc-host@80/lpc-snoop@0)

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>