samsung: boards: update display configs with 16bpp mode.

16 bpp mode is required by LCD console mode.
This change updates exynos board files.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/trats2.h b/include/configs/trats2.h
index a66358b..a97ecb2 100644
--- a/include/configs/trats2.h
+++ b/include/configs/trats2.h
@@ -326,7 +326,7 @@
 #define CONFIG_EXYNOS_FB
 #define CONFIG_LCD
 #define CONFIG_CMD_BMP
-#define CONFIG_BMP_32BPP
+#define CONFIG_BMP_16BPP
 #define CONFIG_FB_ADDR		0x52504000
 #define CONFIG_S6E8AX0
 #define CONFIG_EXYNOS_MIPI_DSIM