clk: sunxi: signedness bug in sun8i_h3_bus_gates_init()

"index" needs to be signed for the error handling to work.

Fixes: ab6e23a4 ('clk: sunxi: Add H3 clocks support')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

drivers/clk/sunxi/clk-sun8i-bus-gates.c

@@ -40,7 +40,7 @@ static void __init sun8i_h3_bus_gates_init(struct device_node *node)
 	const __be32 *p;
 	int number, i;
 	u8 clk_bit;
-	u32 index;
+	int index;
 
 	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
 	if (IS_ERR(reg))