if the string "DFU!" is found at the beginning of the RAM (e.g. as
written by the main application during USB detach), the DFU
bootloader will be started.
Change-Id: I298e3697c06d352a6e0f47266097844c490e1722
the board specific definitions should be coded when particular
environment variable/marco is defined.
this macro name is provided by the makefile in the BOARD variable.
this allows to compile the bootloader for specific devices.
see README for more information.
the board definition for the sysmoOCTSIM is also added.
Change-Id: Ie51a3af7c77ba76ac40570b871f31fd527fb255b
Harald Welte
Kevin Redon