Specify address of UART device to use as a console

This patch adds the ability to specify the base address of a UART
device for initialising the console. This allows a boot loader stage
to use a different UART device from UART0 (default) for the console.

Change-Id: Ie60b927389ae26085cfc90d22a564ff83ba62955
diff --git a/drivers/arm/peripherals/pl011/console.h b/drivers/arm/peripherals/pl011/console.h
index ea45b43..e285909 100644
--- a/drivers/arm/peripherals/pl011/console.h
+++ b/drivers/arm/peripherals/pl011/console.h
@@ -31,7 +31,7 @@
 #ifndef __CONSOLE_H__
 #define __CONSOLE_H__
 
-void console_init(void);
+void console_init(unsigned long base_addr);
 int console_putc(int c);
 int console_getc(void);