sh: pfc: Error out on pinctrl init resolution failure.

pinctrl support is required for correct operation, failure to locate
the init routine is fatal.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/sh/pfc/core.c b/drivers/sh/pfc/core.c
index b81d335..6816937 100644
--- a/drivers/sh/pfc/core.c
+++ b/drivers/sh/pfc/core.c
@@ -536,6 +536,9 @@
 
 		if (unlikely(ret != 0))
 			goto err;
+	} else {
+		pr_err("failed to initialize pinctrl bindings\n");
+		goto err;
 	}
 
 	/*