VRBRAIN: some updates from PX4 Firmware
stm32_i2c: handle more error conditions on I2C bus
mtd driver: add missing SPI header
stm32_serial: fixed spelling of FLOWCONTROL config option in stm32 serial code
CONFIG_ARCH_IRQPRIO: some updates from PX4 NuttX
VRBRAIN: change I2C timeout from 10ms to 1ms
VRBRAIN: new pre-compiled archives for all VR Brain boards
VRBRAIN: enabled AirSpeed for VRBrain 5.1 and VR Micro Brain 5.1
MB12XX: changed driver and configuration of boards and added module for building into makefiles
VRBRAIN: restore original version with all 8 CH output