lib: ble_conn_params: fix wrong config name in prompt condition

Fix wrong Kconfig option name in the conditional for the prompt
of BLE_CONN_PARAMS_INITIATE_DATA_LENGTH_UPDATE.

Signed-off-by: Andreas Moltumyr <[email protected]>

Author: anhmolt

doc/nrf-bm/release_notes/release_notes_changelog.rst

@@ -56,6 +56,10 @@ Libraries
 
    * Updated the :c:func:`bm_zms_register` function to return ``-EINVAL`` when passing ``NULL`` input parameters.
 
+* :ref:`lib_ble_conn_params` library:
+
+   * Fixed an issue that caused the :kconfig:option:`CONFIG_BLE_CONN_PARAMS_INITIATE_DATA_LENGTH_UPDATE` Kconfig option to always be hidden.
+
 Samples
 =======
 

lib/ble_conn_params/Kconfig

@@ -120,7 +120,8 @@ config BLE_CONN_PARAMS_DATA_LENGTH_RX
 	  definitive max data length of 251, the ATT MTU needs to be configured to at least 247.
 
 config BLE_CONN_PARAMS_INITIATE_DATA_LENGTH_UPDATE
-	bool "Initiate data length update on connection" if BLE_CONN_PARAMS_DATA_LENGTH != 27
+	bool "Initiate data length update on connection" if BLE_CONN_PARAMS_DATA_LENGTH_TX != 27 || \
+							    BLE_CONN_PARAMS_DATA_LENGTH_RX != 27
 
 endif # BLE_CONN_PARAMS_AUTO_DATA_LENGTH