samples: clock_control: Align for nRF9251

Align clock_control sample for nRF9251 target.

Signed-off-by: Adam Kondraciuk <adam.kondraciuk@nordicsemi.no>

Author: adamkondraciuk

samples/zephyr/boards/nordic/clock_control/configs/nrf92_cpuapp_hsfll.conf

@@ -0,0 +1,6 @@
+# Copyright (c) 2026 Nordic Semiconductor ASA
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+CONFIG_CLOCK_CONTROL=y
+
+CONFIG_SAMPLE_CLOCK_FREQUENCY_HZ=256000000

samples/zephyr/boards/nordic/clock_control/sample.yaml

@@ -37,7 +37,7 @@ tests:
     platform_allow:
       - nrf9251dk/nrf9251/cpuapp
     extra_args:
-      - CONF_FILE="${ZEPHYR_BASE}/samples/boards/nordic/clock_control/configs/cpuapp_hsfll.conf"
+      - CONF_FILE="configs/nrf92_cpuapp_hsfll.conf"
       - DTC_OVERLAY_FILE="${ZEPHYR_BASE}/samples/boards/nordic/clock_control/configs/cpuapp_hsfll.overlay"
   nrf.extended.sample.boards.nrf.clock_control.global_hsfll:
     platform_allow: