fix typos "wich" -> "which"

Signed-off-by: Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/drivers/w1/masters/matrox_w1.c b/drivers/w1/masters/matrox_w1.c
index 591809c..2788b8c 100644
--- a/drivers/w1/masters/matrox_w1.c
+++ b/drivers/w1/masters/matrox_w1.c
@@ -98,7 +98,7 @@
  *
  * Using tristate pins, since i can't find any open-drain pin in whole motherboard.
  * Unfortunately we can't connect to Intel's 82801xx IO controller
- * since we don't know motherboard schema, wich has pretty unused(may be not) GPIO.
+ * since we don't know motherboard schema, which has pretty unused(may be not) GPIO.
  *
  * I've heard that PIIX also has open drain pin.
  *