[POWERPC] move_device_tree() should be __init

WARNING: vmlinux.o(.text+0x1e4c0): Section mismatch in reference from the
function .move_device_tree() to the function .init.text:.lmb_alloc_base()
The function .move_device_tree() references
the function __init .lmb_alloc_base().
This is often because .move_device_tree lacks a __init
annotation or the annotation of .lmb_alloc_base is wrong.

move_device_tree() is called from early_init_devtree() only, which is __init
Signed-off-by: NGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/kernel/prom.c

@@ -437,7 +437,7 @@ early_param("mem", early_parse_mem);
  * The device tree may be allocated beyond our memory limit, or inside the
  * crash kernel region for kdump. If so, move it out of the way.
  */
-static void move_device_tree(void)
+static void __init move_device_tree(void)
 {
 	unsigned long start, size;
 	void *p;