boards: esp_wrover_kit: update CMakeLists.txt
boards: esp_wrover_kit: update CMakeLists.txt

remove dependency on pinmux definition.

Signed-off-by: Glauber Maroto Ferreira <dedf8e032f416c6160988666098d376154426ed6@espressif.com>

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