Removed all references to a specific MCU in "generic" files
Inclusion of generic <msp430.h> file is done in cpu.h
Made the headers of files in 'cpu/msp430x16x' and 'cpu/cc430' generic
Added definition of correct MCU model in MSP430-based board headers
wip
display_putchar imports
workaround build issue introduced by 533729c

https://github.com/RIOT-OS/RIOT/pull/408#issuecomment-30416710