arm64: dts: ls1028a: qds: enable lpuart1

LPUART nodes by default are disabled in LS1028A device
tree, Enabling LPUART1 node

Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Vabhav Sharma <vabhav.sharma@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>