Staging: vme: fix {master,slave}_get check bug

It's checking the wrong functions; fix it.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Acked-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>