Spelling fix: explicitly

From: Jean Delvare <khali@linux-fr.org>

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/scsi/wd33c93.h b/drivers/scsi/wd33c93.h
index 61ffb86..00123f2 100644
--- a/drivers/scsi/wd33c93.h
+++ b/drivers/scsi/wd33c93.h
@@ -155,7 +155,7 @@
 #define WD33C93_FS_12_15 OWNID_FS_12
 #define WD33C93_FS_16_20 OWNID_FS_16
 
-   /* pass input-clock explicitely. accepted mhz values are 8-10,12-20 */
+   /* pass input-clock explicitly. accepted mhz values are 8-10,12-20 */
 #define WD33C93_FS_MHZ(mhz) (mhz)
 
    /* Control register */