s5pc1xx: support serial driver

This patch includes the serial driver for s5pc1xx.
s5pc1xx uart driver needs own register setting and clock configuration.
So, need to special driver.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/common/serial.c b/common/serial.c
index b4db46b..5f9ffd7 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -69,6 +69,18 @@
 #else
 #error "CONFIG_SERIAL? missing."
 #endif
+#elif defined(CONFIG_S5PC1XX)
+#if defined(CONFIG_SERIAL0)
+	return &s5pc1xx_serial0_device;
+#elif defined(CONFIG_SERIAL1)
+	return &s5pc1xx_serial1_device;
+#elif defined(CONFIG_SERIAL2)
+	return &s5pc1xx_serial2_device;
+#elif defined(CONFIG_SERIAL3)
+	return &s5pc1xx_serial3_device;
+#else
+#error "CONFIG_SERIAL? missing."
+#endif
 #elif defined(CONFIG_OMAP3_ZOOM2)
 		return ZOOM2_DEFAULT_SERIAL_DEVICE;
 #else
@@ -141,6 +153,12 @@
 	serial_register(&s3c24xx_serial1_device);
 	serial_register(&s3c24xx_serial2_device);
 #endif
+#if defined(CONFIG_S5PC1XX)
+	serial_register(&s5pc1xx_serial0_device);
+	serial_register(&s5pc1xx_serial1_device);
+	serial_register(&s5pc1xx_serial2_device);
+	serial_register(&s5pc1xx_serial3_device);
+#endif
 	serial_assign (default_serial_console ()->name);
 }