uboot-phytec

configs: omapl138_lcdk: enable NAND self-init in SPL

Now that we have enabled the driver-model in SPL, we can remove the
code disabling NAND self-init in SPL from the config include for
omapl138-lcdk.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>