staging: vc04_services: interface: vchi: Correct long line comments and make them C89 style

Correct long lines of comments to respect 80 character per line
limit and make them C89 style one.
Found using checkpatch.pl.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/20200320024337.4754-1-vkor@vkten.in


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