staging: vt6655: fix LONG_LINE warning

This patch will fix LONG_LINE error from checkpatch, by using ternary
operator.

Signed-off-by: Matej Dujava <mdujava@kocurkovo.cz>
Link: https://lore.kernel.org/r/1588520570-14388-3-git-send-email-mdujava@kocurkovo.cz


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>