Silence some warnings

libuavcan: Forgot to change define

FS: Add logic to detach a file structure from a file descriptor.  This is for use only within the OS.  It permits an open file or driver to be used across multiple threads.

lcd/Kconfig, Make.defs: Remove dependency of CONFIG_LCD_NXDRIVER for building non-graphic, SLCD drivers.

get I2C working for STM32L4

1-wire:  Initialization/uninitialization functions are not use MCU-independent up_ naming.  Should use STM32-specific stm32_ naming.  These are not globally accessible but only accessible from STM32 board logic.

get I2C working.  some more work regarding clocking computation is needed, as is some inhertited 'todo's from the basis code.  but it does work with the devices tested so far.

STM32 CAN: Add support for both RX FIFOs

Additional configuration option to enable SST26 driver debug output.  Using comming FS debug output generates too much output.

complete logic in 'create stack' and 'use stack' to support stack coloration.  Fix some booboos breaking compatibility with TLS in libc.

altered pin defs for I2C pins; these needed to be specified as open-drain (otherwise they are push-pull)

complete logic in 'create stack' and 'use stack' to support stack coloration.  Fix some booboos breaking compatibility with TLS in libc.