staging: unisys: include: channel.h: fixed comment formatting issues

Removed comments from the right side of the lines.

Added kernel-doc like comments and cleaned up the inline comments in the
structures.
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>