MIPS: Ingenic: Refresh defconfig for CU1000-Neo and CU1830-Neo.

Refresh the defconfig files of CU1000-Neo board and CU1830-Neo board,
remove the selection of SPI-GPIO, and add the selection of SSI.

Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>