superio: Uncomment the w83627uhg UART clock source initialization

The asrock/imb-a180 mainboard is the first mainboard to use this
w83627uhg/nct6627UD sio. The default h/w clock setting is 0. Adding
the SIO in the mainboard Kconfig made the builder complain that the
set_uart_clock_source() wasn't being used. So the calls to that function
were uncommented.

Change-Id: Iedba035237c5c0fa230b02ff4799bb8c1b7bbd4a
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/4573
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
diff --git a/src/superio/winbond/w83627uhg/superio.c b/src/superio/winbond/w83627uhg/superio.c
index 3f1ca38..9de7ac0 100644
--- a/src/superio/winbond/w83627uhg/superio.c
+++ b/src/superio/winbond/w83627uhg/superio.c
@@ -68,22 +68,22 @@
 
 	switch(dev->path.pnp.device) {
 	case W83627UHG_SP1:
-		/* set_uart_clock_source(dev, 0); */
+		set_uart_clock_source(dev, 0);
 		break;
 	case W83627UHG_SP2:
-		/* set_uart_clock_source(dev, 0); */
+		set_uart_clock_source(dev, 0);
 		break;
 	case W83627UHG_SP3:
-		/* set_uart_clock_source(dev, 0); */
+		set_uart_clock_source(dev, 0);
 		break;
 	case W83627UHG_SP4:
-		/* set_uart_clock_source(dev, 0); */
+		set_uart_clock_source(dev, 0);
 		break;
 	case W83627UHG_SP5:
-		/* set_uart_clock_source(dev, 0); */
+		set_uart_clock_source(dev, 0);
 		break;
 	case W83627UHG_SP6:
-		/* set_uart_clock_source(dev, 0); */
+		set_uart_clock_source(dev, 0);
 		break;
 	case W83627UHG_KBC:
 		pc_keyboard_init(&conf->keyboard);