platform/chrome: cros_hps_i2c: make remove callback return void

Commit ed5c2f5fd10d ("i2c: Make remove callback return void") changed
the return type of the 'remove' callback to void, but this driver was
originally written before that change landed. Update the remove callback
to match.

Fixes: 5f9952548d91 ("platform/chrome: add a driver for HPS")
Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Dan Callaghan <[e-mail]>
Signed-off-by: Tzung-Bi Shih <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/platform/chrome/cros_hps_i2c.c

···
 	return 0;
 }
 
-static int hps_i2c_remove(struct i2c_client *client)
+static void hps_i2c_remove(struct i2c_client *client)
 {
 	struct hps_drvdata *hps = i2c_get_clientdata(client);
 
···
 	 * (i.e. powered on).
 	 */
 	hps_set_power(hps, true);
-
-	return 0;
 }
 
 static int hps_suspend(struct device *dev)