staging: unisys: fix parameters for SPAR_VBUS_CHANNEL_OK_CLIENT macro

Remove the unused logCtx parameter and fix the CamelCase name:

pChannel => ch

Update calls to the macro to remove the unused second parameter.

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>