Changes to button driver: HAVE_BUTTON_DATA targets pass the button data straight back in the button_read_device() call
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15262 a1c6a512-1295-4272-9138-f99709370657
but will not actually be used in the bootloader once rockbox main is running)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14937 a1c6a512-1295-4272-9138-f99709370657