dell-laptop: use dell_smbios_find_token() instead of find_token_location()

Replace all uses of find_token_location() with dell_smbios_find_token()
to avoid directly accessing the da_tokens table.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

drivers/platform/x86/dell-laptop.c

@@ -874,15 +874,15 @@ static void dell_cleanup_rfkill(void)
 static int dell_send_intensity(struct backlight_device *bd)
 {
 	struct calling_interface_buffer *buffer;
-	int token;
+	struct calling_interface_token *token;
 	int ret;
 
-	token = find_token_location(BRIGHTNESS_TOKEN);
-	if (token == -1)
+	token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
+	if (!token)
 		return -ENODEV;
 
 	buffer = dell_smbios_get_buffer();
-	buffer->input[0] = token;
+	buffer->input[0] = token->location;
 	buffer->input[1] = bd->props.brightness;
 
 	if (power_supply_is_system_supplied() > 0)
@@ -899,15 +899,15 @@ static int dell_send_intensity(struct backlight_device *bd)
 static int dell_get_intensity(struct backlight_device *bd)
 {
 	struct calling_interface_buffer *buffer;
-	int token;
+	struct calling_interface_token *token;
 	int ret;
 
-	token = find_token_location(BRIGHTNESS_TOKEN);
-	if (token == -1)
+	token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
+	if (!token)
 		return -ENODEV;
 
 	buffer = dell_smbios_get_buffer();
-	buffer->input[0] = token;
+	buffer->input[0] = token->location;
 
 	if (power_supply_is_system_supplied() > 0)
 		dell_smbios_send_request(0, 2);
@@ -1987,8 +1987,8 @@ static void kbd_led_exit(void)
 static int __init dell_init(void)
 {
 	struct calling_interface_buffer *buffer;
+	struct calling_interface_token *token;
 	int max_intensity = 0;
-	int token;
 	int ret;
 
 	if (!dmi_check_system(dell_device_table))
@@ -2030,10 +2030,10 @@ static int __init dell_init(void)
 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
 		return 0;
 
-	token = find_token_location(BRIGHTNESS_TOKEN);
-	if (token != -1) {
+	token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
+	if (token) {
 		buffer = dell_smbios_get_buffer();
-		buffer->input[0] = token;
+		buffer->input[0] = token->location;
 		dell_smbios_send_request(0, 2);
 		if (buffer->output[0] == 0)
 			max_intensity = buffer->output[3];