[][MAC80211][WiFi6][mt76][Fix binfile cannot sync precal data to atenl]

[Description]
Fix binfile cannot sync precal data to atenl
Binfile is viewed as efuse mode in atenl, so atenl does not allocate
precal memory for its eeprom file
Use mtd offset == 0xFFFFFFFF to determine whether it is binfile or flash mode
Add support for loading precal in binfile mode

[Release-log]
N/A

Change-Id: I7c12150a1c49b512e7094dd5af11c176a97086e0
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8178937
1 file changed