Rpi: Fix build of Raspberry Pi.

* Raspberry Pi is broken now after
  the other recent arm work... needs
  more investigation.
* Comment out stage2 header as it
  links to headers with c++ code.
  Need to verify entry.s can call
  c++ code (I think it's mangled to
  the assembly or something)
* Fix naming of code entry to match
  other arm code.

src/system/boot/platform/raspberrypi_arm/entry.S

@@ -1,6 +1,6 @@
 .section .init
-.globl _start
+.globl _entry
-_start:
+_entry:
 	b jmp_loader
 
 .section .text
@@ -14,12 +14,12 @@ jmp_loader:
 
 	/* For Thumb code? */
 	/*
-	ldr r12, =pi_start
+	ldr r12, =_start
 	mov lr, pc
 	bx r12
 	*/
 
-	b pi_start
+	b _start
 
 	/* Cause exception if loader returns */
 	swi 0xFFFFFF

src/system/boot/platform/raspberrypi_arm/start.c

@@ -15,7 +15,7 @@
 #include <KernelExport.h>
 #include <boot/platform.h>
 #include <boot/heap.h>
-#include <boot/stage2.h>
+//#include <boot/stage2.h>
 #include <arch/cpu.h>
 
 #include <string.h>
@@ -103,7 +103,7 @@ platform_exit(void)
 
 
 void
-pi_start(void)
+_start(void)
 {
 	stage2_args args;
 

src/system/ldscripts/arm/boot_loader_raspberrypi_arm.ld

@@ -1,6 +1,6 @@
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
-ENTRY(_start)
+ENTRY(_entry)
 
 C_STACK_SIZE	= 1048576;
 IRQ_STACK_SIZE	= 0;