dm integrity: fix ppc64le warning

Otherwise:

In file included from drivers/md/dm-integrity.c:13:
drivers/md/dm-integrity.c: In function 'dm_integrity_status':
drivers/md/dm-integrity.c:3061:10: error: format '%llu' expects
argument of type 'long long unsigned int', but argument 4 has type
'long int' [-Werror=format=]
   DMEMIT("%llu %llu",
          ^~~~~~~~~~~
    atomic64_read(&ic->number_of_mismatches),
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/device-mapper.h:550:46: note: in definition of macro 'DMEMIT'
      0 : scnprintf(result + sz, maxlen - sz, x))
                                              ^
cc1: all warnings being treated as errors

Fixes: 7649194a ("dm integrity: remove sector type casts")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-integrity.c

@@ -3069,7 +3069,7 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
 	switch (type) {
 	case STATUSTYPE_INFO:
 		DMEMIT("%llu %llu",
-			atomic64_read(&ic->number_of_mismatches),
+			(unsigned long long)atomic64_read(&ic->number_of_mismatches),
 			ic->provided_data_sectors);
 		if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING))
 			DMEMIT(" %llu", le64_to_cpu(ic->sb->recalc_sector));