lirc_imon: filter out spurious input in mouse mode
lirc_imon: filter out spurious input in mouse mode

Only send mouse button press data *or* mouse movement data, not
both at the same time. Based on a patch by Scott Meacham.

stb-tester/lirc,stb-tester/lirc,stb-tester/lirc,stb-tester/lirc,stb-tester/lirc,stb-tester/lirc