configs: nitrogen6x: Add DM_SPI/DM_SPI_FLASH support

Add CONFIG_DM_SPI/CONFIG_DM_SPI_FLASH to all defconfigs whose board is
    nitrogen6x.

    mx6qsabrelite_defconfig
    nitrogen6dl2g_defconfig
    nitrogen6dl_defconfig
    nitrogen6q2g_defconfig
    nitrogen6q_defconfig
    nitrogen6s1g_defconfig

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
7 files changed