add initial support for Freescale MKW22D512 SiP
add support for pba-d-01
convert MKW22D5.h to unix format
add eh_frame and adjust stack size in linkerscript
fix gpio driver
fix uart driver
add low level spi driver
fix hwtimer
fix posix read
adopt periph files for pba-d-01 board
add crash.c for cortex m4
add SiP interconnection identifier
add i2c driver for mkw2x