updated Makefilde dep, add the gpioint dependency to use cc110x on MSBA2
board
updated CFLAGS Variable
updated Makefile for the MSBA2 board
updated Makefile for the AVSEXTREM board
Makfile for the AVSEXTREM board drivers
drivers for the AVSEXTREM board.
include files of the AVSEXTREM board drivers.
updated bord init file of the AVSEXTREM board
coding conventions