x86: also use debug_pagealloc_enabled() for free_init_pages

x86: also use debug_pagealloc_enabled() for free_init_pages

we want to couple all debugging features with debug_pagealloc_enabled()
and not with the config option CONFIG_DEBUG_PAGEALLOC.

Signed-off-by: Christian Borntraeger <[email protected]>
Suggested-by: David Rientjes <[email protected]>
Acked-by: David Rientjes <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Cc: Laura Abbott <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Heiko Carstens <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>