IB/ehca: Use common error code mapping instead of specific ones

Instead of one error mapping function for each potential error source
in ehca_mrmw.c, use a centralized function that handles all cases,
saving a three-figure line count.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ehca/ehca_tools.h b/drivers/infiniband/hw/ehca/ehca_tools.h
index 03b185f..fd8238b 100644
--- a/drivers/infiniband/hw/ehca/ehca_tools.h
+++ b/drivers/infiniband/hw/ehca/ehca_tools.h
@@ -161,8 +161,11 @@
 	switch (ehca_rc) {
 	case H_SUCCESS:
 		return 0;
+	case H_RESOURCE:             /* Resource in use */
 	case H_BUSY:
 		return -EBUSY;
+	case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
+	case H_CONSTRAINED:          /* resource constraint */
 	case H_NO_MEM:
 		return -ENOMEM;
 	default: