arm64: dts: ls1028a: add missing SPI nodes

The LS1028A has three (dual) SPI controller. These are compatible with
the ones from the LS1021A. Add the nodes.

The third controller was tested on a custom board.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
1 file changed