lpcmanager

Fix LPCExtension.py to conform to the new beremiz extension interface (added autoload boolean)
#ifdef ONBOARD_I2C
if(onboardbusfd!=-1)
ioctl(onboardbusfd, RTSMT_ONBOARD_RTIOC_READ, &onBoardReadBuf);
#endif /* ONBOARD_I2C */
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