dm: stv0991: Move serial to driver model

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h
index 80652a8..fd9bd63 100644
--- a/include/configs/stv0991.h
+++ b/include/configs/stv0991.h
@@ -28,14 +28,21 @@
 	(PHYS_SDRAM_1_SIZE - CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MAXARGS			16
 #define CONFIG_SYS_MALLOC_LEN			(CONFIG_ENV_SIZE + 16 * 1024)
+#define CONFIG_SYS_MALLOC_F_LEN			0x2000
 
+#define CONFIG_DM
 /* serial port (PL011) configuration */
-#define CONFIG_SYS_SERIAL0			0x80406000
-#define CONFIG_PL011_SERIAL
-#define CONFIG_CONS_INDEX			0
 #define CONFIG_BAUDRATE				115200
-#define CONFIG_PL01x_PORTS			{(void *)CONFIG_SYS_SERIAL0}
-#define CONFIG_PL011_CLOCK			(2700 * 1000)
+#ifdef CONFIG_DM
+#define CONFIG_DM_SERIAL
+#define CONFIG_PL01X_SERIAL
+#else
+#define CONFIG_SYS_SERIAL0                     0x80406000
+#define CONFIG_CONS_INDEX			0
+#define CONFIG_PL011_SERIAL
+#define CONFIG_PL01x_PORTS                     {(void *)CONFIG_SYS_SERIAL0}
+#define CONFIG_PL011_CLOCK                     (2700 * 1000)
+#endif
 
 /* user interface */
 #define CONFIG_SYS_PROMPT			"STV0991> "