staging: unisys: include: simplify spar_check_channel_client

The function spar_check_channel_client shouldn't need to do
readq's, it is referencing a local copy of the channel
header. Simplify it to just access the fields directly.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>