ipc_service: icmsg: Trigger data read after magic
ipc_service: icmsg: Trigger data read after magic

After magic is read during bound procedure, trigger an
initial data read. This is to ensure data is not missed
when piggybacked on magic's exchange interrupt.

Signed-off-by: Pawel Dunaj <ea2ed61998e18f01fdc731077c63bf3b1fed950c@nordicsemi.no>

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