s390/qdio: clarify logical vs absolute in QIB's kerneldoc

qib.isliba and qib.osliba are actually logical addresses, and this is
also how the relevant code sets up these fields. Fix up the
documentation.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/qdio.h

@@ -91,8 +91,8 @@ struct qdr {
  * @pfmt: implementation dependent parameter format
  * @rflags: QEBSM
  * @ac: adapter characteristics
- * @isliba: absolute address of first input SLIB
- * @osliba: absolute address of first output SLIB
+ * @isliba: logical address of first input SLIB
+ * @osliba: logical address of first output SLIB
  * @ebcnam: adapter identifier in EBCDIC
  * @parm: implementation dependent parameters
  */