stv0991: use fdt for serial port platform data

This patch ignores the serial port static platform data at compilation time
in case of device tree control.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

board/st/stv0991/stv0991.c

@@ -21,6 +21,7 @@ DECLARE_GLOBAL_DATA_PTR;
 struct gpio_regs *const gpioa_regs =
 		(struct gpio_regs *) GPIOA_BASE_ADDR;
 
+#ifndef CONFIG_OF_CONTROL
 static const struct pl01x_serial_platdata serial_platdata = {
 	.base = 0x80406000,
 	.type = TYPE_PL011,
@@ -31,6 +32,7 @@ U_BOOT_DEVICE(stv09911_serials) = {
 	.name = "serial_pl01x",
 	.platdata = &serial_platdata,
 };
+#endif
 
 #ifdef CONFIG_SHOW_BOOT_PROGRESS
 void show_boot_progress(int progress)