Bluetooth: Host: Fix wrong length of antenna identifiers for CTE RX
Bluetooth: Host: Fix wrong length of antenna identifiers for CTE RX

There were used an uninitialized variable to set antenna identifiers
length. The value should be set with use of params argument, not
by cp pointer that is not yet initialized.

Signed-off-by: Piotr Pryga <4cae3388a6c6e480df2109bb21aa832bf2c59595@nordicsemi.no>

zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr