ec_host_cmd: Fix unused return value from k_sem_take call
ec_host_cmd: Fix unused return value from k_sem_take call

Fixes Coverity issue 214881.

Fixes #29018

Signed-off-by: Lauren Murphy <ce8d3478b631de4cc130a07ddd0282d1734fed61@intel.com>

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