i2c: zx2967: always use the same device when printing errors

Let's always use the platform device for dev_* and not sometimes the
adapter device as well. Also fix this checkpatch check:

CHECK: Macro argument 'i2c' may be better as '(i2c)' to avoid precedence issues

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

Author: Wolfram Sang

drivers/i2c/busses/i2c-zx2967.c

@@ -53,7 +53,7 @@
 
 #define I2C_TIMEOUT			msecs_to_jiffies(1000)
 
-#define DEV(i2c)			(&i2c->adap.dev)
+#define DEV(i2c)			((i2c)->adap.dev.parent)
 
 struct zx2967_i2c {
 	struct i2c_adapter	adap;