mode2: Make read buffer size dynamic.
mode2: Make read buffer size dynamic.

New input size from the /dev/input events breaks hard-coded limits.
Instead of just raising the limits makes the size dynamic.

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