blockdev-util: add partscan check function that takes an sd_device*

src/shared/blockdev-util.h

@@ -40,7 +40,8 @@ int get_block_device_harder(const char *path, dev_t *dev);
 
 int lock_whole_block_device(dev_t devt, int operation);
 
-int blockdev_partscan_enabled(int fd);
+int blockdev_partscan_enabled(sd_device *d);
+int blockdev_partscan_enabled_fd(int fd);
 
 int fd_is_encrypted(int fd);
 int path_is_encrypted(const char *path);