davinci: omapl138-lcdk: enable CONFIG_USE_TINY_PRINTF

We're working towards enabling the driver-model in SPL for da850-lcdk.
Enable CONFIG_USE_TINY_PRINTF in defconfig to reduce SPL size.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
diff --git a/configs/omapl138_lcdk_defconfig b/configs/omapl138_lcdk_defconfig
index bfb88e3..c4eebb3 100644
--- a/configs/omapl138_lcdk_defconfig
+++ b/configs/omapl138_lcdk_defconfig
@@ -53,3 +53,4 @@
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
+CONFIG_USE_TINY_PRINTF=y