[media] em28xx: use true/false for boolean vars

Instead of using 0 or 1 for boolean, use the true/false
defines.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/media/usb/em28xx/em28xx-input.c
Simple merge

diff --cc drivers/media/usb/em28xx/em28xx-video.c
Simple merge