udoo_neo: Move MX6SX configuration to Kconfig

It's not necessary to define the processor in the defconfig file.

The preferred method to select the SoC is via Kconfig file.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
2 files changed