Split HAVE_SCROLLWHEEL into HAVE_SCROLLWHEEL and HAVE_WHEEL_ACCELERATION, where the latter now activates the wheel acceleration code.
HAVE_SCROLLWHEEL plainly indicates the existence of a scrollwheel, thus all ipods define it now (in addition to the ones and some 
sansas which did before). Same applies to the manual.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20177 a1c6a512-1295-4272-9138-f99709370657
54 files changed