drivers: adc: adc_ad559x: fix driver init

k_thread_name_set() function returns an error if CONFIG_THREAD_NAME is
not enabled which may make the driver not functional.

Fix the issue by adding a check against CONFIG_THREAD_NAME avaliability
before calling k_thread_name_set() function so the driver can operate
properly with CONFIG_THREAD_NAME disabled.

(cherry picked from commit f565f4c)

Original-Signed-off-by: Lukasz Madej <l.madej@grinn-global.com>
GitOrigin-RevId: f565f4c
Change-Id: I0002f6f852c428103817ab43e0fdf578e1b80b65
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5488597
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Dawid Niedźwiecki <dawidn@google.com>
Commit-Queue: Dawid Niedźwiecki <dawidn@google.com>
Tested-by: Dawid Niedźwiecki <dawidn@google.com>

drivers/adc/adc_ad559x.c

@@ -242,9 +242,11 @@ static int adc_ad559x_init(const struct device *dev)
 			(k_thread_entry_t)adc_ad559x_acquisition_thread, data, NULL, NULL,
 			CONFIG_ADC_AD559X_ACQUISITION_THREAD_PRIO, 0, K_NO_WAIT);
 
-	ret = k_thread_name_set(tid, "adc_ad559x");
-	if (ret < 0) {
-		return ret;
+	if (IS_ENABLED(CONFIG_THREAD_NAME)) {
+		ret = k_thread_name_set(tid, "adc_ad559x");
+		if (ret < 0) {
+			return ret;
+		}
 	}
 
 	adc_context_unlock_unconditionally(&data->ctx);