malta: setup super I/O UARTs

On a real Malta the Super I/O needs to be configured before we are able
to access the UARTs. This patch performs that configuration, setting up
the UARTs in the same way that YAMON would.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c
index 7eddf1c..09da9ea 100644
--- a/board/imgtec/malta/malta.c
+++ b/board/imgtec/malta/malta.c
@@ -12,6 +12,8 @@
 #include <asm/malta.h>
 #include <pci_gt64120.h>
 
+#include "superio.h"
+
 phys_size_t initdram(int board_type)
 {
 	return CONFIG_SYS_MEM_SIZE;
@@ -36,6 +38,14 @@
 	__raw_writel(GORESET, reset_base);
 }
 
+int board_early_init_f(void)
+{
+	/* setup FDC37M817 super I/O controller */
+	malta_superio_init((void *)CKSEG1ADDR(MALTA_IO_PORT_BASE));
+
+	return 0;
+}
+
 void pci_init_board(void)
 {
 	set_io_port_base(CKSEG1ADDR(MALTA_IO_PORT_BASE));