dm: clear unmap write zeroes limits when disabling write zeroes

The unmap write zeroes limits have been set to the stacking queue limits
by default in blk_set_stacking_limits() and blk_stack_limits(), but it
should be cleared if any underlying device does not support it.

Signed-off-by: Zhang Yi <[e-mail]>
Link: https://lore.kernel.org/[e-mail]
Reviewed-by: "Martin K. Petersen" <[e-mail]>
Signed-off-by: Christian Brauner <[e-mail]>

drivers/md/dm-table.c

···
 		limits->discard_alignment = 0;
 	}
 
-	if (!dm_table_supports_write_zeroes(t))
+	if (!dm_table_supports_write_zeroes(t)) {
 		limits->max_write_zeroes_sectors = 0;
+		limits->max_hw_wzeroes_unmap_sectors = 0;
+	}
 
 	if (!dm_table_supports_secure_erase(t))
 		limits->max_secure_erase_sectors = 0;