w1: Fix typo in MODULE_DESCRIPTION in matrox_w1.c

This patch fix spelling typo in matrox_w1.c

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Jiri Kosina <jkosina@suse.com>