[compiler-warnings-fixes] ipmi_sdr.c: remove unused function parameters

Several functions were passed a struct ipmi_intf* even though it was
unused. This removes the unused parameters and changes calls and
signatures.

Partially resolves ipmitool/ipmitool#13

Signed-off-by: Vernon Mauery <vernon.mauery@intel.com>

lib/ipmi_sensor.c

@@ -532,7 +532,7 @@ ipmi_sensor_list(struct ipmi_intf *intf)
 		/* rc = (r == 0) ? rc : r; */
 	}
 
-	ipmi_sdr_end(intf, itr);
+	ipmi_sdr_end(itr);
 
 	return rc;
 }