mfd: rave-sp: Fix typo in rave_sp_checksum comment

Caculated -> Calculated
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/rave-sp.c

@@ -109,7 +109,7 @@ struct rave_sp_reply {
 /**
  * struct rave_sp_checksum - Variant specific checksum implementation details
  *
- * @length:	Caculated checksum length
+ * @length:	Calculated checksum length
  * @subroutine:	Utilized checksum algorithm implementation
  */
 struct rave_sp_checksum {