drivers: display: st7789v: fix function argument

The st7789v_transmit function accepts a device, not device data. As a
result, driver could not be compiled when reset GPIOs were not defined
in Devicetree.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

drivers/display/display_st7789v.c

@@ -104,17 +104,17 @@ static void st7789v_exit_sleep(const struct device *dev)
 
 static void st7789v_reset_display(const struct device *dev)
 {
-	struct st7789v_data *data = dev->data;
-
 	LOG_DBG("Resetting display");
 #if DT_INST_NODE_HAS_PROP(0, reset_gpios)
+	struct st7789v_data *data = dev->data;
+
 	k_sleep(K_MSEC(1));
 	gpio_pin_set(data->reset_gpio, ST7789V_RESET_PIN, 1);
 	k_sleep(K_MSEC(6));
 	gpio_pin_set(data->reset_gpio, ST7789V_RESET_PIN, 0);
 	k_sleep(K_MSEC(20));
 #else
-	st7789v_transmit(data, ST7789V_CMD_SW_RESET, NULL, 0);
+	st7789v_transmit(dev, ST7789V_CMD_SW_RESET, NULL, 0);
 	k_sleep(K_MSEC(5));
 #endif
 }