staging: unisys: include: renamed function spar_check_channel in channel.h to...

staging: unisys: include: renamed function spar_check_channel in channel.h to match driver namespace

Renamed function spar_check_channel() to visor_check_channel().

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>