power: supply: bq27xxx: Fix kernel crash on IRQ handler register error

When registering the IRQ handler fails, do not just return the error code,
this will free the devm_kzalloc()-ed data struct while leaving the queued
work queued and the registered power_supply registered with both of them
now pointing to free-ed memory, resulting in various kernel crashes
soon afterwards.

Instead properly tear-down things on IRQ handler register errors.

Fixes: 703df6c09795 ("power: bq27xxx_battery: Reorganize I2C into a module")
Cc: Andrew F. Davis <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Sebastian Reichel <[e-mail]>

drivers/power/supply/bq27xxx_battery_i2c.c

···
 			dev_err(&client->dev,
 				"Unable to register IRQ %d error %d\n",
 				client->irq, ret);
-			return ret;
+			bq27xxx_battery_teardown(di);
+			goto err_failed;
 		}
 	}