This was accidentally set as "GPLv2", whereas the kernel expects v2
to be written "GPL v2", this caused complaints regarding the use
of the platform device APIs when built as a module.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

INIT_WORK() dropped the data arg, so now we have to stash an extra
pointer and backpedal instead.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for a generic push switch framework. Adaptable for
various switches, including GPIO switches and the push switches commonly
found on Renesas debug boards.

This allows switch states to be trivially reported through sysfs.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>