FIXED103-bugfix2: repair adb functionality in USB-gadget code

+ official HTC evita JB4.1 usb code had adb disabled instead of disabling mass_storage? this commit fixes this issue
+ revert previous nlun changes in board-fighter.c
FIXED104 cam-testing: rename-hack the imx105 cam driver to imx175 to fool the ported ROM

+ try to hack/replace all occurrences of imx105 in the fireball3410 code to make it think it is an imx175 driver
+ this rather radical change is a trail to make the ported Valente(-based) ROMs think they see the imx175 cam as expected, so that we do not need to modify any libs inside the ROM hopefully
+ now the cam apps don't crash anymore and logcat doesn't complain about not found cams any longer => still no actual cam image can be seen in any cam app yet

+ this comes branched out to "cam-testing" for now ... just not to mess up "master" (yet)