Cherry-pick fixes from master for sdl_init in gamecontroller kcm

Until we have a device we shouldn't poll SDL as often to run up the cpu. So until we get a device event only poll every 2 seconds. After we get a device to watch start polling every 100ms.

This still significantly reduces how much we poll since before this we were polling every 1 ms.

Signed-off-by: Jeremy Whiting jpwhiting@kde.org (cherry picked from commit 6f956e62)