Added support for BitBand I/O
Add preliminary support for Cryptographic coprocessor on stm32 F2 and F4
[Style] Coding style fixes.

 * No trailing white spaces
 * No sapces before tabs
 * "int *var" and not "int * var"
[Style] Do not declare new types if not really necessary.
Linker generation script for most of the supported chips
[Style] Removed trailing spaces.
Rework ethernet to module as USB, working transmit
Ethernet transport layer working. Added checksum offload configuration
Merged with origin
Merge branch 'ETH-regs-F4' of ssh://github.com/BuFran/libopencm3 into ETH-regs-F4

Conflicts:
	lib/stm32/f4/Makefile