block: cleanup removing dependency on bootmem headers

Cc: Yinghai Lu <[e-mail]>
Cc: Tejun Heo <[e-mail]>
Cc: Andrew Morton <[e-mail]>

Signed-off-by: Grygorii Strashko <[e-mail]>
Signed-off-by: Santosh Shilimkar <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

block/blk-ioc.c

···
 #include <linux/init.h>
 #include <linux/bio.h>
 #include <linux/blkdev.h>
-#include <linux/bootmem.h>	/* for max_pfn/max_low_pfn */
 #include <linux/slab.h>
 
 #include "blk.h"