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>
diff --git a/include/configs/omapl138_lcdk.h b/include/configs/omapl138_lcdk.h
index 20fd7ff..db4a663 100644
--- a/include/configs/omapl138_lcdk.h
+++ b/include/configs/omapl138_lcdk.h
@@ -168,10 +168,6 @@
 #define CONFIG_SPL_NAND_DRIVERS
 #define CONFIG_SPL_NAND_ECC
 #define CONFIG_SPL_NAND_LOAD
-
-#ifndef CONFIG_SPL_BUILD
-#define CONFIG_SYS_NAND_SELF_INIT
-#endif
 #endif
 
 #ifdef CONFIG_SYS_USE_NOR