ppc4xx: Use common NS16550 driver for PPC4xx UART

This patch removes the PPC4xx UART driver. Instead the common NS16550
driver is used, since all PPC4xx SoC's use this peripheral device.

The file 4xx_uart.c now only implements the UART clock calculation
function which also sets the SoC internal UART divisors.

All PPC4xx board config headers are changed to use this common NS16550
driver now.

Tested on these boards:
acadia, canyonlands, katmai, kilauea, sequoia, zeus

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/alpr.h b/include/configs/alpr.h
index ee0c14d..75106b4 100644
--- a/include/configs/alpr.h
+++ b/include/configs/alpr.h
@@ -45,7 +45,6 @@
 #define CONFIG_SYS_MONITOR_BASE	0xfffc0000	/* start of monitor		*/
 #define CONFIG_SYS_PCI_MEMBASE		0x80000000	/* mapped pci memory		*/
 #define	CONFIG_SYS_PCI_MEMSIZE		0x40000000	/* size of mapped pci memory	*/
-#define CONFIG_SYS_PERIPHERAL_BASE	0xe0000000	/* internal peripherals		*/
 #define CONFIG_SYS_ISRAM_BASE		0xc0000000	/* internal SRAM		*/
 #define CONFIG_SYS_PCI_BASE		0xd0000000	/* internal PCI regs		*/
 #define CONFIG_SYS_PCI_MEMBASE1	CONFIG_SYS_PCI_MEMBASE  + 0x10000000
@@ -75,9 +74,14 @@
 /*-----------------------------------------------------------------------
  * Serial Port
  *----------------------------------------------------------------------*/
+#define CONFIG_CONS_INDEX	2	/* Use UART1			*/
+#define CONFIG_SYS_NS16550
+#define CONFIG_SYS_NS16550_SERIAL
+#define CONFIG_SYS_NS16550_REG_SIZE	1
+#define CONFIG_SYS_NS16550_CLK		get_serial_clock()
+
 #undef	CONFIG_SYS_EXT_SERIAL_CLOCK
 #define CONFIG_BAUDRATE		115200
-#define	CONFIG_UART1_CONSOLE		/* define for uart1 as console	*/
 
 #define CONFIG_SYS_BAUDRATE_TABLE  \
     {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200}