dm: Make use of __assign_bit() API

We have for some time the __assign_bit() API to replace
open coded
if (foo)
__set_bit(n, bar);
else
__clear_bit(n, bar);

Use this API to simplify the code. No functional change
intended.

Signed-off-by: Hongbo Li <[e-mail]>
Signed-off-by: Mikulas Patocka <[e-mail]>

drivers/md/dm-clone-metadata.c

···
 		return r;
 
 	for (i = 0; ; i++) {
-		if (dm_bitset_cursor_get_value(&c))
-			__set_bit(i, cmd->region_map);
-		else
-			__clear_bit(i, cmd->region_map);
+		__assign_bit(i, cmd->region_map, dm_bitset_cursor_get_value(&c));
 
 		if (i >= (cmd->nr_regions - 1))
 			break;