triggerhappy: unbreak build against 4.7+ kernel headers
Fixes:
http://autobuild.buildroot.org/results/3d0/
3d07de291ec64a16d03e10f0cf1faeb19d546412/
http://autobuild.buildroot.org/results/b03/
b03500e7d85786c6eee8f0adc38801340129aa14/
http://autobuild.buildroot.org/results/dd0/
dd05caf0db318a9287d239cc6fa5470ccdc2ce7c/
http://autobuild.buildroot.org/results/76b/
76bb000d041bd0828d15aa04138e222a4773ce94/
Triggerhappy used the wrong constants for array sizes, causing a compilation
error about out of array bounds initializers with the SW_PEN_INSERTED switch
event added in 4.7. Fix it by using the correct constants (<foo>_CNT) instead.
Patch submitted upstream: https://github.com/wertarbyte/triggerhappy/pull/12
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>