staging: unisys: visorbus: remove inline keyword in visorchannel.c

Removed inline keyword from functions sig_read_data and
sig_write_data in visorchannel.c

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
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>