Bluetooth: controller: legacy: Correct DLE time calculations
Bluetooth: controller: legacy: Correct DLE time calculations

This PR fixes #23482. The preamble size for a 2M phy was incorrect.

There is a bug in calculation of time for the DLE procedure:
the preamble size is incorrect for the 2M phy

Fixes #23482

Signed-off-by: Andries Kruithof <51b9e94fd9719f930d9278e9897457f29ad12e15@nordicsemi.no>

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