i2c: npcm7xx: Remove unnecessary parentheses

Remove unnecessary parentheses around _bus_.

This issue was found with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-npcm7xx.c

@@ -2248,7 +2248,7 @@ static int npcm_i2c_probe_bus(struct platform_device *pdev)
 
 	bus->reg = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(bus->reg))
-		return PTR_ERR((bus)->reg);
+		return PTR_ERR(bus->reg);
 
 	spin_lock_init(&bus->lock);
 	init_completion(&bus->cmd_complete);