staging: skein: cleanup: add operator white space

Added white space between operators and operands. Because this sometimes
maxed out the column width, some expressions were broken up into multiple
lines, and comments were moved appropriately.

Signed-off-by: Manu Kumar <maraku@gmx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>