[U-Boot] Patch dependency

The below patches depend on the series patches(http://patchwork.ozlabs.org/patch/567250/).

[PATCH v3 1/3] armv8/ls1043aqds: Select lpuart pins of various muxes [PATCH v3 2/3] armv8/ls1043aqds: Spilt off board device tree [PATCH v3 3/3] armv8/ls1043aqds: Add lpuart support