stm32f40.xml: core driver now resides in core/cortex
stm32f40.xml: core driver now resides in core/cortex

dergraaf/xpcc,chrism333/xpcc,dergraaf/xpcc,chrism333/xpcc,chrism333/xpcc,dergraaf/xpcc,chrism333/xpcc,dergraaf/xpcc