dm integrity: make blk_integrity_profile structure const

Make this structure const as it is only stored in the profile field of a
blk_integrity structure. This field is of type const, so make structure
as const.

Signed-off-by: Bhumika Goyal <[e-mail]>
Signed-off-by: Mike Snitzer <[e-mail]>

drivers/md/dm-integrity.c

···
 /*
  * DM Integrity profile, protection is performed layer above (dm-crypt)
  */
-static struct blk_integrity_profile dm_integrity_profile = {
+static const struct blk_integrity_profile dm_integrity_profile = {
 	.name			= "DM-DIF-EXT-TAG",
 	.generate_fn		= NULL,
 	.verify_fn		= NULL,