serial: mpc512x: Move serial registration from serial_initialize()

Move the registration of serialN_device ports from default
serial_initialize() into driver specific function called from
serial_initialize(). This slims down the serial_initialize() call
to a bare tracker of all possible serial port registration routines
in U-Boot.

The newly implemented mpc512x_serial_initialize() function, which is
implemented inside of the mpc512x serial driver allows encapsulation
of serialN_device within the mpc512x serial driver itself.

Also, remove the exports of serialN_device from include/serial.h
as they are no longer needed. This is simply because the implementation of
default_serial_console() is wrapped into the mpx512x serial driver and
the default console is picked by CONFIG_SERIAL<N> macro in config file.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>

arch/powerpc/cpu/mpc512x/serial.c

@@ -365,6 +365,22 @@ __weak struct serial_device *default_serial_console(void)
 #endif
 }
 
+void mpc512x_serial_initialize(void)
+{
+#if defined(CONFIG_SYS_PSC1)
+	serial_register(&serial1_device);
+#endif
+#if defined(CONFIG_SYS_PSC3)
+	serial_register(&serial3_device);
+#endif
+#if defined(CONFIG_SYS_PSC4)
+	serial_register(&serial4_device);
+#endif
+#if defined(CONFIG_SYS_PSC6)
+	serial_register(&serial6_device);
+#endif
+}
+
 #else
 
 void serial_setbrg(void)

common/serial.c

@@ -45,6 +45,7 @@ serial_initfunc(pxa_serial_initialize);
 serial_initfunc(s3c24xx_serial_initialize);
 serial_initfunc(s5p_serial_initialize);
 serial_initfunc(zynq_serial_initalize);
+serial_initfunc(mpc512x_serial_initialize);
 serial_initfunc(uartlite_serial_initialize);
 
 void serial_register(struct serial_device *dev)
@@ -82,20 +83,7 @@ void serial_initialize(void)
 	pxa_serial_initialize();
 	s3c24xx_serial_initialize();
 	s5p_serial_initialize();
-#if defined(CONFIG_MPC512X)
-#if defined(CONFIG_SYS_PSC1)
-	serial_register(&serial1_device);
-#endif
-#if defined(CONFIG_SYS_PSC3)
-	serial_register(&serial3_device);
-#endif
-#if defined(CONFIG_SYS_PSC4)
-	serial_register(&serial4_device);
-#endif
-#if defined(CONFIG_SYS_PSC6)
-	serial_register(&serial6_device);
-#endif
-#endif
+	mpc512x_serial_initialize();
 #if defined(CONFIG_SYS_BFIN_UART)
 	serial_register_bfin_uart();
 #endif

include/serial.h

@@ -43,13 +43,6 @@ extern struct serial_device eserial4_device;
 
 #endif
 
-#if defined(CONFIG_MPC512X)
-extern struct serial_device serial1_device;
-extern struct serial_device serial3_device;
-extern struct serial_device serial4_device;
-extern struct serial_device serial6_device;
-#endif
-
 #if defined(CONFIG_OMAP3_ZOOM2)
 extern struct serial_device zoom2_serial_device0;
 extern struct serial_device zoom2_serial_device1;