staging: unisys: visorinput: subsume .h files directly into visorinput.c

keyboardchannel.h and mousechannel.h are now included within
visorinput.c directly.

Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>