at91rm9200ek: use atmel_usart

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/board/atmel/at91rm9200ek/at91rm9200ek.c b/board/atmel/at91rm9200ek/at91rm9200ek.c
index 5ebc24d..ec0daba 100644
--- a/board/atmel/at91rm9200ek/at91rm9200ek.c
+++ b/board/atmel/at91rm9200ek/at91rm9200ek.c
@@ -31,6 +31,7 @@
 #include <asm/arch/hardware.h>
 #include <asm/arch/at91_pio.h>
 #include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_common.h>
 #include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -54,6 +55,12 @@
 	return 0;
 }
 
+int board_early_init_f(void)
+{
+	at91_seriald_hw_init();
+	return 0;
+}
+
 int dram_init (void)
 {
 	/* dram_init must store complete ramsize in gd->ram_size */