[POWERPC] ps3: Fix section mismatch in ps3/setup.c

WARNING: vmlinux.o(.text+0x605d4): Section mismatch: reference to
.init.text:.__alloc_bootmem (between '.prealloc' and '.ps3_power_save')

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/ps3/setup.c

@@ -109,7 +109,7 @@ static void ps3_panic(char *str)
 
 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
     defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
-static void prealloc(struct ps3_prealloc *p)
+static void __init prealloc(struct ps3_prealloc *p)
 {
 	if (!p->size)
 		return;