softer handling of "invalid manufacturer id"

[rusefillc]

at the moment flash driver does osalDbgAssert should it be handled in a more graceful manner?

chDbgPanic3 (msg=0x80ccec8 "invalid manufacturer id", file=0x80cccd4 "ChibiOS/os/rt/src/chsys.c", line=220) at ./controllers/core/error_handling.cpp:432

[rusefillc]

same incident as rusefi/rusefi#8327