drivers: gpio: pca95xx does not compile with CONFIG_GPIO_PCA95XX_INTERRUPT

[Explorer001]

When enabling the pca95xx driver with interrupt support, this will lead to compile errors.

I successfully used the pca95xx gpio expander already. After updating my main branch my project fails to compile.

To Reproduce
Steps to reproduce the behavior:

1. Enable the pca95xx driver with interrupts

CONFIG_I2C=y
CONFIG_GPIO=y
CONFIG_GPIO_PCA95XX=y
CONFIG_GPIO_PCA95XX_INTERRUPT=y

2. Add the expander to your device tree. Example for nrf given below.

&i2c0 {
	compatible = "nordic,nrf-twi";
	status = "okay";
	sda-pin = <4>;
	scl-pin = <5>;

	pca9555: pca9555@20 {
		compatible = "nxp,pca95xx";
		label = "GPIO_P0";
		reg = <0x20>;
		gpio-controller;
		#gpio-cells = <2>;
		ngpios = <16>;
		interrupt-gpios = <&gpio0 15 (GPIO_ACTIVE_LOW)>;
	};
};

3. Build with west build for a board of your liking.

Expected behavior
The program should compile with no error.

Impact
The program does not compile, stopping development.

Logs and console output

Errors caused by commit 80ee515.

/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c: In function 'gpio_pca95xx_pin_interrupt_configure':
/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c:610:5: error: 'int_gpio' undeclared (first use in this function)
  610 |    &int_gpio, active ?
      |     ^~~~~~~~
/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c:610:5: note: each undeclared identifier is reported only
once for each function it appears in
/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c: In function 'gpio_pca95xx_init':
/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c:708:4: error: 'err' undeclared (first use in this function)
  708 |    err = -ENODEV;
      |    ^~~
/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c:724:21: error: 'cfg' undeclared (first use in this function)
  724 |   gpio_add_callback(cfg->int_gpio.port, &drv_data->gpio_callback);
      |                     ^~~
/data/git/zephyr-workspace/zephyr/drivers/gpio/gpio_pca95xx.c:709:4: error: label 'err' used but not defined
  709 |    goto err;

Environment (please complete the following information):

• OS: Linux
• Toolchain: zephyr sdk 0.13.1
• No compile errors when using 5af7fe6.
• Error starts occurring with commit 80ee515.