serial: Use default_serial_puts() in drivers

Replace the in-place ad-hoc implementation of serial_puts() within
the drivers with default_serial_puts() call. This cuts down on the
code duplication quite a bit.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
diff --git a/board/pcippc2/pcippc2.c b/board/pcippc2/pcippc2.c
index 4a91458..5e6fc58 100644
--- a/board/pcippc2/pcippc2.c
+++ b/board/pcippc2/pcippc2.c
@@ -29,6 +29,7 @@
 #include <watchdog.h>
 #include <pci.h>
 #include <netdev.h>
+#include <serial.h>
 
 #include "hardware.h"
 #include "pcippc2.h"
@@ -129,7 +130,7 @@
 	fpga_serial_init (sconsole_get_baudrate ());
 
 	sconsole_putc   = fpga_serial_putc;
-	sconsole_puts   = fpga_serial_puts;
+	sconsole_puts   = default_serial_puts;
 	sconsole_getc   = fpga_serial_getc;
 	sconsole_tstc   = fpga_serial_tstc;
 	sconsole_setbrg = fpga_serial_setbrg;