audio mode load: gracefully handle mode files of wrong AEC version Irrespective of which AEC policy we adopt for FC Selenite (keep L1_NEW_AEC disabled like in Magnetite or enable it like in Tourmaline), we MUST gracefully handle the case of wrong AEC version on audio mode load: disable AEC instead of loading garbage. Therefore, we apply the same change to src/cs/services/audio/audio_mode_load.c as we made in Tourmaline and Magnetite last year.

# hw properties
LINK_SCRIPT_SRC=src/cs/system/template/gsm_ds_pirelli_flash.template
RAM_LINK_SCRIPT_SRC=src/cs/system/template/gsm_ds_pirelli_ram.template
FLASH_BASE_ADDR=0
FLASH_SECTOR_SIZE=0x40000

# default config
GPRS=0
SRVC=0
FCHG_STATE=1
RVTMUX_ON_MODEM=0