[POWERPC] bootwrapper: Move linker symbols into ops.h

Most of these were previously used by numerous C files and
redeclared in each one.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index 2bc2f02..e4b6139 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -196,4 +196,14 @@
 extern unsigned long timebase_period_ns;
 void udelay(long delay);
 
+extern char _start[];
+extern char __bss_start[];
+extern char _end[];
+extern char _vmlinux_start[];
+extern char _vmlinux_end[];
+extern char _initrd_start[];
+extern char _initrd_end[];
+extern char _dtb_start[];
+extern char _dtb_end[];
+
 #endif /* _PPC_BOOT_OPS_H_ */