The original submitter of this squished everything into one series, and
has not returned. The code mostly appears good, and review comments were
followed for the most part. The project doesn't really maintain any
testing or board farm for sam3/sam4 parts, so we're going to just trust
our users.
Reviewed-by: Karl Palsson <karlp@tweak.net.au>
sam/4l: IRQ Configuration file (irq.json)
sam/4l: Basic Memory Map.
sam/4l: GPIO Defines.
sam/4l: GPIO Functions
Added everything that needed to compile the library: Makefile, Linker
Script and common includes.
sam/4l: SCIF function to start OSC.
sam/4l: GPIO Enable/Disable and Multiplexing configuration functions.
sam/4l: PLL Clock configuration.
sam/4l: Peripheral clock configuration and basic USART support.
sam: USART Character length configuration.
sam/4l: Generic Clock configuration functions.
sam/4l: Analog to Digital Converter Interface (ADCIFE) basic support.
