arm64: dts: lx2160a: add dspi controller DT nodes

Add the dspi support on lx2160

Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
Signed-off-by: Bao Xiaowei <xiaowei.bao@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>