soc: esp32: linker: exclude smp source from rom area
soc: esp32: linker: exclude smp source from rom area

SMP support might not work if esp_mp.c initialization code
is placed in ROM area. This fix that scenario.

Signed-off-by: Sylvio Alves <bd63183a3ab542e2b25ff1e90971d4881e1bdbe5@espressif.com>

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