lib: utils/reset: separate driver init func

Move driver init code to separate function, so it can be reused
elsewhere.

Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>

include/sbi_utils/reset/fdt_reset.h

@@ -17,6 +17,11 @@ struct fdt_reset {
 	int (*init)(void *fdt, int nodeoff, const struct fdt_match *match);
 };
 
+/**
+ * fdt_reset_driver_init() - initialize reset driver based on the device-tree
+ */
+int fdt_reset_driver_init(void *fdt, struct fdt_reset *drv);
+
 /**
  * fdt_reset_init() - initialize reset drivers based on the device-tree
  *