qcacmn: Add qdf_status_from_os_return()

It is sometimes useful to reverse map an errno into a QDF_STATUS. For
this purpose, introduce qdf_status_from_os_return(), the logical inverse
operation of qdf_status_to_os_return().

Change-Id: I053f43867ef603c2654eca64fe76c7bd313e14e4
CRs-Fixed: 2242664

qdf/inc/qdf_util.h

@@ -128,6 +128,17 @@ static inline int qdf_status_to_os_return(QDF_STATUS status)
 	return __qdf_status_to_os_return(status);
 }
 
+/**
+ * qdf_status_from_os_return() - map OS specific return code to a QDF_STATUS
+ * @rc: the input return code to map
+ *
+ * Return: QDF_STATUS
+ */
+static inline QDF_STATUS qdf_status_from_os_return(int rc)
+{
+	return __qdf_status_from_os_return(rc);
+}
+
 /**
  * qdf_set_bit() - set bit in address
  * @nr: bit number to be set