[POWERPC] Move declaration of init_bootmem_done into system.h

... instead of having an extern declaration in a .c file.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h
index 2b6559a..df781ad 100644
--- a/include/asm-powerpc/system.h
+++ b/include/asm-powerpc/system.h
@@ -190,6 +190,7 @@
 
 extern unsigned int rtas_data;
 extern int mem_init_done;	/* set on boot once kmalloc can be called */
+extern int init_bootmem_done;	/* set on !NUMA once bootmem is available */
 extern unsigned long memory_limit;
 extern unsigned long klimit;